2019 |
Samorì, P; Biscarini, F Interface Engineering in Organic Devices Article de journal Dans: Advanced Materials Technologies, 4 (1900303), 2019. @article{Samorì2019, title = {Interface Engineering in Organic Devices}, author = {P. Samorì and F. Biscarini}, editor = {Wiley Online Library }, url = {https://doi.org/10.1002/admt.201900303}, year = {2019}, date = {2019-05-10}, journal = {Advanced Materials Technologies}, volume = {4}, number = {1900303}, abstract = {Interfaces are ubiquitous in nature and play a key role in many fundamental physical and chemical processes. In organic electronic devices, where charge injection, charge transport, and trapping are indeed interfacial phenomena, the intrinsic properties of the active materials, their processability and their response in devices can be modulated and even disguised by mismatched interfacial properties, sometimes hampering the concept of “properties by molecular design” which is one of the pillars of organic electronics. Tailoring the interface and thus achieving full control over their properties in fabrication processes of organic devices, and optimizing them for device response, is technologically challenging due to the intertwining of complex phenomena during the assembly of molecular and supramolecular architectures on technological surfaces. Examples include the control of molecular orientation, nucleation and growth of molecularly ordered domains which affect the surface roughness and lateral morphological correlations, as well as the coexistence of misoriented crystalline domains, their size distribution and the extent of domain boundaries. Dynamic processes such as wetting, dewetting and ripening govern the occurrence of (re‐)crystallization yielding the formation of inhomogeneous thin films on specific length scales during the device fabrication, and can also be subjected to re‐adjustment while the device is “in‐action” thereby affecting its time‐stability. From the more functional viewpoint, the boosting of charge injection can be attained via the optimization of energy level alignment and the minimization of energy barriers through the physisorption or chemisorption of suitably designed molecular building blocks. Moreover, density of charged surface states, (local) doping and trapping can be modulated via non‐covalent surface interactions. The bottom‐up engineering of the physical chemistry of the interfaces is an effective approach towards the multiscale control of supramolecular organization and energy (dis‐)order of the device interfaces, such as organic/dielectric, organic/electrode, organic/organic, and organic/ambient. The approach is also central to the design of chemo‐ and biosensors, as it endows them with sensitivity and selectivity towards specific analytes. Interface engineering has to be regarded, therefore, as an enabling strategy for achieving unprecedented multifunctional and multi‐responsive organic devices with full control over the correlation between structure and function. This special section of Advanced Materials Technologies reports a few enlightening recent experimental and chemical‐design approaches aimed at controlling and tuning some technologically relevant interfacial properties in organic devices, including field‐effect transistors, solar cells and light‐emitting diodes. We briefly overview below the five contributions to this special section, sorting them according to a logical sequence, from charge‐injection interfaces, to transport‐layer interfaces, to novel low‐dimensional architectures for organic devices. Work function modification is the central topic of the article by V. Diez‐Cabanes and co‐workers, as a joint collaboration between Université de Mons (Belgium), ICMAB‐CSIC and CIBER‐BBN Barcelona (Spain), Università di Parma (Italy), and Universidad de Ambato (Ecuador). Self‐assembling monolayers (SAMs) are a vastly explored topic both experimentally and theoretically in organic electronics devices, and SAMs are already consolidated in the manufacturing technology of organic devices. Here the authors report a not‐so well investigated effect, viz. the role of molecular polarizability of SAMs on the work function modification of Au electrodes, and in particular, using a donor‐acceptor paradigmatic dyad, ferrocene (D) and PCTM radical (A), they rationalize the effect of charge transfer and spin states on determining the work function and level alignment at the charge injection interface, also suggesting routes for tailoring the work function shift. The article by F. Hermerschmidt, S. A. Choulis, and E. J. W. List‐Kratochvil from Humboldt Universität Berlin (Germany) addresses a nowadays relevant technological problem which is the availability, processing and replacement of ITO in conductive transparent electrodes for optoelectronics applications such as OPV and OLED. The authors discuss the potential of the use of metal nanoparticles that are inkjet‐printed, how to process them to control conductivity and interfacial properties, to show how the manufacturing of organic optoelectronics devices can be aligned to a whole‐additive printing platform. The article by Weining Zhang, Hongliang Chen, and Xuefeng Guo, from Peking University (China) reviews the recent developments and challenges of interface‐engineered organic optoelectronic devices for future applications in electronics and optoelectronics. They emphasize the control of interfacial charge transport for building functional optoelectronic devices, by means of the finest control of individual layers of materials and their interfaces in devices, to design functional transistors, biodetection devices, and flexible electronics, as well as other types of traditional optoelectronic devices, such as photodetectors, photovoltaic devices, and light‐emitting devices, with unprecedented characteristics or unique functionalities. The group of Yun Li from Nanjing University (China) presents an overview of the technology of field‐effect transistors based on solution‐processed two‐dimensional molecular crystals (2DMCs), as a route to overcome the limits in the charge transport properties imposed by the heterogenous nature of active layers and thin films. They highlight the present capability of upscaled manufacturing of OFETs with 2DMCs, which shows how the field has moved in recent years from the very fundamental field of organic single crystals for studies of the transport physics, towards an enabling technology that may lead to high performance back‐end panels and logic circuits that consumer electronics requires. The contribution by Zhengbang Wang and Christof Wöll from Karlsruhe Institute of Technology (KIT) (Germany) introduces an emerging class of low‐dimensional nanomaterials, metal‐organic frameworks (MOFs), that are encountering the interest of materials scientists for the next generation of hybrid organic/inorganic optoelectronics, photonics and sensing devices. In particular, the authors discuss the approach to MOFs based on the programmed layer‐by‐layer assembly technique, which enables exquisite control over the MOF architecture on surfaces (SURMOFs) across large areas and with very high control of order and orientation. The relevant properties and device applications are finally reviewed. This special section well reflects the breadth of this burgeoning and interdisciplinary field of science, which holds great potential for technological breakthroughs. We hope the readers of Advanced Materials Technologies find these contributions inspiring in terms of the importance of devising novel approaches, based on both knowledge and chemical creativity, for the technology of organic devices. With best regards, Paolo Samorì & Fabio Biscarini (Guest Editors) Biographies Paolo Samorì is Distinguished Professor at the Université de Strasbourg, Director of the Institut de Science et d'Ingénierie Supramoléculaires (ISIS). He obtained a Laurea at University of Bologna and his PhD at the Humboldt University of Berlin. He was permanent research scientist at Istituto per la Sintesi Organica e la Fotoreattività of the Consiglio Nazionale delle Ricerche of Bologna. His research interests encompass nanochemistry, supramolecular sciences, materials chemistry, and scanning probe microscopies with a specific focus on graphene and other 2D materials as well as functional organic/polymeric and hybrid nanomaterials for application in optoelectronics, energy and sensing. image Fabio Biscarini is Full Professor of General Chemistry and Nanobiotechnology in the Life Sciences Department, Università di Modena e Reggio Emilia since 2013. From 2017 he is Research Associate at Istituto Italiano di Tecnologia (IIT)‐Center for Translational Neurosciences in Ferrara, where he heads the Organic Neuroelectronics team. He graduated in Industrial Chemistry at Università di Bologna (1986), received a PhD in Chemistry at University of Oregon (1993), and was postdoc (1994–1995) at Consiglio Nazionale delle Ricerche (CNR) Bologna, where became Research Scientist (1994–2000), Senior Scientist (2001–2010), and Research Director (2010–2013). His current research interests are in fundamental aspects of organic bioelectronics, biosensors, and implantable devices for bidirectional communication with the central nervous system. }, keywords = {}, pubstate = {published}, tppubtype = {article} } Interfaces are ubiquitous in nature and play a key role in many fundamental physical and chemical processes. In organic electronic devices, where charge injection, charge transport, and trapping are indeed interfacial phenomena, the intrinsic properties of the active materials, their processability and their response in devices can be modulated and even disguised by mismatched interfacial properties, sometimes hampering the concept of “properties by molecular design” which is one of the pillars of organic electronics. Tailoring the interface and thus achieving full control over their properties in fabrication processes of organic devices, and optimizing them for device response, is technologically challenging due to the intertwining of complex phenomena during the assembly of molecular and supramolecular architectures on technological surfaces. Examples include the control of molecular orientation, nucleation and growth of molecularly ordered domains which affect the surface roughness and lateral morphological correlations, as well as the coexistence of misoriented crystalline domains, their size distribution and the extent of domain boundaries. Dynamic processes such as wetting, dewetting and ripening govern the occurrence of (re‐)crystallization yielding the formation of inhomogeneous thin films on specific length scales during the device fabrication, and can also be subjected to re‐adjustment while the device is “in‐action” thereby affecting its time‐stability. From the more functional viewpoint, the boosting of charge injection can be attained via the optimization of energy level alignment and the minimization of energy barriers through the physisorption or chemisorption of suitably designed molecular building blocks. Moreover, density of charged surface states, (local) doping and trapping can be modulated via non‐covalent surface interactions. The bottom‐up engineering of the physical chemistry of the interfaces is an effective approach towards the multiscale control of supramolecular organization and energy (dis‐)order of the device interfaces, such as organic/dielectric, organic/electrode, organic/organic, and organic/ambient. The approach is also central to the design of chemo‐ and biosensors, as it endows them with sensitivity and selectivity towards specific analytes. Interface engineering has to be regarded, therefore, as an enabling strategy for achieving unprecedented multifunctional and multi‐responsive organic devices with full control over the correlation between structure and function. This special section of Advanced Materials Technologies reports a few enlightening recent experimental and chemical‐design approaches aimed at controlling and tuning some technologically relevant interfacial properties in organic devices, including field‐effect transistors, solar cells and light‐emitting diodes. We briefly overview below the five contributions to this special section, sorting them according to a logical sequence, from charge‐injection interfaces, to transport‐layer interfaces, to novel low‐dimensional architectures for organic devices. Work function modification is the central topic of the article by V. Diez‐Cabanes and co‐workers, as a joint collaboration between Université de Mons (Belgium), ICMAB‐CSIC and CIBER‐BBN Barcelona (Spain), Università di Parma (Italy), and Universidad de Ambato (Ecuador). Self‐assembling monolayers (SAMs) are a vastly explored topic both experimentally and theoretically in organic electronics devices, and SAMs are already consolidated in the manufacturing technology of organic devices. Here the authors report a not‐so well investigated effect, viz. the role of molecular polarizability of SAMs on the work function modification of Au electrodes, and in particular, using a donor‐acceptor paradigmatic dyad, ferrocene (D) and PCTM radical (A), they rationalize the effect of charge transfer and spin states on determining the work function and level alignment at the charge injection interface, also suggesting routes for tailoring the work function shift. The article by F. Hermerschmidt, S. A. Choulis, and E. J. W. List‐Kratochvil from Humboldt Universität Berlin (Germany) addresses a nowadays relevant technological problem which is the availability, processing and replacement of ITO in conductive transparent electrodes for optoelectronics applications such as OPV and OLED. The authors discuss the potential of the use of metal nanoparticles that are inkjet‐printed, how to process them to control conductivity and interfacial properties, to show how the manufacturing of organic optoelectronics devices can be aligned to a whole‐additive printing platform. The article by Weining Zhang, Hongliang Chen, and Xuefeng Guo, from Peking University (China) reviews the recent developments and challenges of interface‐engineered organic optoelectronic devices for future applications in electronics and optoelectronics. They emphasize the control of interfacial charge transport for building functional optoelectronic devices, by means of the finest control of individual layers of materials and their interfaces in devices, to design functional transistors, biodetection devices, and flexible electronics, as well as other types of traditional optoelectronic devices, such as photodetectors, photovoltaic devices, and light‐emitting devices, with unprecedented characteristics or unique functionalities. The group of Yun Li from Nanjing University (China) presents an overview of the technology of field‐effect transistors based on solution‐processed two‐dimensional molecular crystals (2DMCs), as a route to overcome the limits in the charge transport properties imposed by the heterogenous nature of active layers and thin films. They highlight the present capability of upscaled manufacturing of OFETs with 2DMCs, which shows how the field has moved in recent years from the very fundamental field of organic single crystals for studies of the transport physics, towards an enabling technology that may lead to high performance back‐end panels and logic circuits that consumer electronics requires. The contribution by Zhengbang Wang and Christof Wöll from Karlsruhe Institute of Technology (KIT) (Germany) introduces an emerging class of low‐dimensional nanomaterials, metal‐organic frameworks (MOFs), that are encountering the interest of materials scientists for the next generation of hybrid organic/inorganic optoelectronics, photonics and sensing devices. In particular, the authors discuss the approach to MOFs based on the programmed layer‐by‐layer assembly technique, which enables exquisite control over the MOF architecture on surfaces (SURMOFs) across large areas and with very high control of order and orientation. The relevant properties and device applications are finally reviewed. This special section well reflects the breadth of this burgeoning and interdisciplinary field of science, which holds great potential for technological breakthroughs. We hope the readers of Advanced Materials Technologies find these contributions inspiring in terms of the importance of devising novel approaches, based on both knowledge and chemical creativity, for the technology of organic devices. With best regards, Paolo Samorì & Fabio Biscarini (Guest Editors) Biographies Paolo Samorì is Distinguished Professor at the Université de Strasbourg, Director of the Institut de Science et d'Ingénierie Supramoléculaires (ISIS). He obtained a Laurea at University of Bologna and his PhD at the Humboldt University of Berlin. He was permanent research scientist at Istituto per la Sintesi Organica e la Fotoreattività of the Consiglio Nazionale delle Ricerche of Bologna. His research interests encompass nanochemistry, supramolecular sciences, materials chemistry, and scanning probe microscopies with a specific focus on graphene and other 2D materials as well as functional organic/polymeric and hybrid nanomaterials for application in optoelectronics, energy and sensing. image Fabio Biscarini is Full Professor of General Chemistry and Nanobiotechnology in the Life Sciences Department, Università di Modena e Reggio Emilia since 2013. From 2017 he is Research Associate at Istituto Italiano di Tecnologia (IIT)‐Center for Translational Neurosciences in Ferrara, where he heads the Organic Neuroelectronics team. He graduated in Industrial Chemistry at Università di Bologna (1986), received a PhD in Chemistry at University of Oregon (1993), and was postdoc (1994–1995) at Consiglio Nazionale delle Ricerche (CNR) Bologna, where became Research Scientist (1994–2000), Senior Scientist (2001–2010), and Research Director (2010–2013). His current research interests are in fundamental aspects of organic bioelectronics, biosensors, and implantable devices for bidirectional communication with the central nervous system. |
Muchowska, Kamila B; Varma, Sreejith J; Moran, Joseph Synthesis and breakdown of universal metabolic precursors promoted by iron Article de journal Dans: Nature, 569 , p. 104-107, 2019. @article{Muchowska2019, title = {Synthesis and breakdown of universal metabolic precursors promoted by iron}, author = {Kamila B. Muchowska and Sreejith J. Varma and Joseph Moran }, editor = {Nature}, url = {https://www.nature.com/articles/s41586-019-1151-1}, doi = {DOI: 10.1038/s41586-019-1151-1}, year = {2019}, date = {2019-05-01}, journal = {Nature}, volume = {569}, pages = {104-107}, abstract = {Life builds its molecules from carbon dioxide (CO2) and breaks them back down again through the intermediacy of just five metabolites, which are the universal hubs of biochemistry1. However, it is unclear how core biological metabolism began and why it uses the intermediates, reactions and pathways that it does. Here we describe a purely chemical reaction network promoted by ferrous iron, in which aqueous pyruvate and glyoxylate—two products of abiotic CO2 reduction2,3,4—build up 9 of the 11 intermediates of the biological Krebs (or tricarboxylic acid) cycle, including all 5 universal metabolic precursors. The intermediates simultaneously break down to CO2 in a life-like regime that resembles biological anabolism and catabolism5. Adding hydroxylamine6,7,8 and metallic iron into the system produces four biological amino acids in a manner that parallels biosynthesis. The observed network overlaps substantially with the Krebs and glyoxylate cycles9,10, and may represent a prebiotic precursor to these core metabolic pathways.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Life builds its molecules from carbon dioxide (CO2) and breaks them back down again through the intermediacy of just five metabolites, which are the universal hubs of biochemistry1. However, it is unclear how core biological metabolism began and why it uses the intermediates, reactions and pathways that it does. Here we describe a purely chemical reaction network promoted by ferrous iron, in which aqueous pyruvate and glyoxylate—two products of abiotic CO2 reduction2,3,4—build up 9 of the 11 intermediates of the biological Krebs (or tricarboxylic acid) cycle, including all 5 universal metabolic precursors. The intermediates simultaneously break down to CO2 in a life-like regime that resembles biological anabolism and catabolism5. Adding hydroxylamine6,7,8 and metallic iron into the system produces four biological amino acids in a manner that parallels biosynthesis. The observed network overlaps substantially with the Krebs and glyoxylate cycles9,10, and may represent a prebiotic precursor to these core metabolic pathways. |
Aliprandi, A; Eredia, M; Anichini, C; Baaziz, W; Ersen, O; Ciesielski, A; Samorì, P Persian waxing of graphite: towards green large-scale production of graphene Article de journal Dans: Chem. Commun 2019, 55 , p. 5331-5334, 2019. @article{Aliprandi2019, title = {Persian waxing of graphite: towards green large-scale production of graphene}, author = {A. Aliprandi and M. Eredia and C. Anichini and W. Baaziz and O. Ersen and A. Ciesielski and P. Samorì}, doi = {10.1039/c9cc01822k}, year = {2019}, date = {2019-04-04}, journal = {Chem. Commun 2019}, volume = {55}, pages = {5331-5334}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Guasch, J; Crivillers, N; Souto, M; Ratera, I; Rovira, C; Samorì, P; Veciana, J Two-dimensional self-assembly and electrical properties of the donor-acceptor tetrathiafulvalene-polychlorotriphenylmethyl radical on graphite substrates Article de journal Dans: Journal of Applied Physics, 125 (142909), 2019. @article{Guasch2019, title = {Two-dimensional self-assembly and electrical properties of the donor-acceptor tetrathiafulvalene-polychlorotriphenylmethyl radical on graphite substrates}, author = {J. Guasch and N. Crivillers and M. Souto and I. Ratera and C. Rovira and P. Samorì and J. Veciana}, editor = {AIP }, url = {https://aip.scitation.org/doi/abs/10.1063/1.5065448}, doi = {10.1063/1.5065448}, year = {2019}, date = {2019-04-02}, journal = {Journal of Applied Physics}, volume = {125}, number = {142909}, abstract = {The electron donor-acceptor tetrathiafulvalene-polychlorotriphenylmethyl (PTM) radical dyad, which shows a strong interplay between intra- and intermolecular charge transfer processes in solution, has been deposited by drop-casting on highly oriented pyrolytic graphite substrates, and its self-assembled structure has been investigated. Conducting atomic force microscopy revealed that the presence of a PTM radical in the molecules enhances the electrical conduction by almost two orders of magnitude and that this enhancement occurs in spite of the poor molecular orientation control achieved with drop-casting. Moreover, the study also reveals that the presence of a tetrathiafulvalene subunit in the deposited molecules can result in slightly asymmetric I-V curves.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The electron donor-acceptor tetrathiafulvalene-polychlorotriphenylmethyl (PTM) radical dyad, which shows a strong interplay between intra- and intermolecular charge transfer processes in solution, has been deposited by drop-casting on highly oriented pyrolytic graphite substrates, and its self-assembled structure has been investigated. Conducting atomic force microscopy revealed that the presence of a PTM radical in the molecules enhances the electrical conduction by almost two orders of magnitude and that this enhancement occurs in spite of the poor molecular orientation control achieved with drop-casting. Moreover, the study also reveals that the presence of a tetrathiafulvalene subunit in the deposited molecules can result in slightly asymmetric I-V curves. |
Zhao, Yuda; Bertolazzi, Simone; Samorì, Paolo A Universal Approach toward Light-Responsive Two-Dimensional Electronics: Chemically Tailored Hybrid van der Waals Heterostructures Article de journal Dans: ACS Nano 2019, 13 (4), p. 4814-4825, 2019. @article{Zhao2019, title = {A Universal Approach toward Light-Responsive Two-Dimensional Electronics: Chemically Tailored Hybrid van der Waals Heterostructures}, author = {Yuda Zhao and Simone Bertolazzi and Paolo Samorì}, editor = {2019 American Chemical Society}, url = {https://pubs.acs.org/doi/pdf/10.1021/acsnano.9b01716}, doi = {10.1021/acsnano.9b01716}, year = {2019}, date = {2019-03-27}, journal = {ACS Nano 2019}, volume = {13}, number = {4}, pages = {4814-4825}, abstract = {Stimuli-responsive hybrid van der Waals heterostructures (vdWHs), composed of organic molecular switches superimposed on inorganic 2D materials (2DMs), can combine the outstanding physical properties of the latter components with the virtually infinite variety of tunable functionality of molecules, thereby offering an efficient protocol for the development of high-performance multifunctional materials and devices. The use of light as a remote control to modulate the properties of semiconducting 2DMs when interfaced with photochromic molecules suffers from both the limitation associated with the persistent photoconductivity characterizing the 2DMs and the finite thermal stability of the photochromic molecule in its different states. Here, we have devised a universal approach toward the fabrication of optically switchable electronic devices comprising a few nanometers thick azobenzene (AZO) layer physisorbed on 2D semiconductors supported on a trap-free polymer dielectric. The joint effect of the improved 2D/dielectric interface, the molecule’s light-modulated dipolar doping, and the high thermal stability of cis-AZO offers the highest control over the reversible and efficient charge carrier tuning in 2D semiconductors with a preserved high performance in 2D field-effect transistors, as quantified in terms of carrier mobility and Ion/Ioff ratio. The device has the potential to operate as an optical memory with four current levels and long retention time (>15 h). Furthermore, by using a CMOS-compatible micropatterning process, the photoswitchable resistor–diode transition has been achieved on hybrid lateral heterojunction devices. Our approach is of general applicability toward the generation of high-performance hybrid vdWHs for the emergence of functional and responsive devices.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Stimuli-responsive hybrid van der Waals heterostructures (vdWHs), composed of organic molecular switches superimposed on inorganic 2D materials (2DMs), can combine the outstanding physical properties of the latter components with the virtually infinite variety of tunable functionality of molecules, thereby offering an efficient protocol for the development of high-performance multifunctional materials and devices. The use of light as a remote control to modulate the properties of semiconducting 2DMs when interfaced with photochromic molecules suffers from both the limitation associated with the persistent photoconductivity characterizing the 2DMs and the finite thermal stability of the photochromic molecule in its different states. Here, we have devised a universal approach toward the fabrication of optically switchable electronic devices comprising a few nanometers thick azobenzene (AZO) layer physisorbed on 2D semiconductors supported on a trap-free polymer dielectric. The joint effect of the improved 2D/dielectric interface, the molecule’s light-modulated dipolar doping, and the high thermal stability of cis-AZO offers the highest control over the reversible and efficient charge carrier tuning in 2D semiconductors with a preserved high performance in 2D field-effect transistors, as quantified in terms of carrier mobility and Ion/Ioff ratio. The device has the potential to operate as an optical memory with four current levels and long retention time (>15 h). Furthermore, by using a CMOS-compatible micropatterning process, the photoswitchable resistor–diode transition has been achieved on hybrid lateral heterojunction devices. Our approach is of general applicability toward the generation of high-performance hybrid vdWHs for the emergence of functional and responsive devices. |
Hagenmüller, David; Schachenmayer, Johannes; Genet, Cyriaque; Ebbesen, Thomas W; Pupillo, Guido Enhancement of the Electron−Phonon Scattering Induced by Intrinsic Surface Plasmon−Phonon Polaritons Article de journal Dans: ACS Photonics 2019, 6 (4), pp 1073–1081, 6 (4), p. 1073-1081, 2019. @article{Hagenmüller2019, title = {Enhancement of the Electron−Phonon Scattering Induced by Intrinsic Surface Plasmon−Phonon Polaritons}, author = {David Hagenmüller and Johannes Schachenmayer and Cyriaque Genet and Thomas W. Ebbesen and Guido Pupillo}, editor = {Copyright © 2019 American Chemical Society }, doi = {DOI: 10.1021/acsphotonics.9b00268}, year = {2019}, date = {2019-03-17}, journal = {ACS Photonics 2019, 6 (4), pp 1073–1081}, volume = {6}, number = {4}, pages = {1073-1081}, abstract = {We investigate light−matter coupling in metallic crystals where plasmons coexist with phonons exhibiting large oscillator strength. We demonstrate theoretically that this coexistence can lead to strong light−matter interactions without external resonators. When the frequencies of plasmons and phonons are comparable, hybridization of these collective matter modes occurs in the crystal. We show that the coupling of these modes to photonic degrees of freedom gives rise to intrinsic surface plasmon−phonon polaritons, which offer the unique possibility to control the phonon properties by tuning the electron density and the crystal thickness. In particular, dressed phonons with reduced frequency and large wave vectors arise in the case of quasi-2D crystals, which could lead to large enhancements of the electron−phonon scattering in the vibrational ultrastrong coupling regime. This suggests that photons can play a key role in determining the quantum properties of certain materials. A nonperturbative self-consistent Hamiltonian method is presented that is valid for arbitrarily large coupling strengths.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We investigate light−matter coupling in metallic crystals where plasmons coexist with phonons exhibiting large oscillator strength. We demonstrate theoretically that this coexistence can lead to strong light−matter interactions without external resonators. When the frequencies of plasmons and phonons are comparable, hybridization of these collective matter modes occurs in the crystal. We show that the coupling of these modes to photonic degrees of freedom gives rise to intrinsic surface plasmon−phonon polaritons, which offer the unique possibility to control the phonon properties by tuning the electron density and the crystal thickness. In particular, dressed phonons with reduced frequency and large wave vectors arise in the case of quasi-2D crystals, which could lead to large enhancements of the electron−phonon scattering in the vibrational ultrastrong coupling regime. This suggests that photons can play a key role in determining the quantum properties of certain materials. A nonperturbative self-consistent Hamiltonian method is presented that is valid for arbitrarily large coupling strengths. |
Bertolazzi, S; Bondavalli, P; Roche, S; San, T; Choi, S -Y; Colombo, L; Bonaccorso, F; Samorì, P Nonvolatile Memories Based on Graphene and Related 2D Materials Article de journal Dans: Advanced Materials, 31 (Issue 10), p. 1806663, 2019. @article{Bertolazzi2019, title = {Nonvolatile Memories Based on Graphene and Related 2D Materials}, author = {S. Bertolazzi and P. Bondavalli and S. Roche and T. San and S.-Y. Choi and L. Colombo and F. Bonaccorso and P. Samorì}, editor = {Wiley Online Library}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201806663}, doi = {DOI: 10.1002/adma.201806663}, year = {2019}, date = {2019-03-08}, journal = {Advanced Materials}, volume = {31}, number = {Issue 10}, pages = {1806663}, abstract = {The pervasiveness of information technologies is generating an impressive amount of data, which need to be accessed very quickly. Nonvolatile memories (NVMs) are making inroads into high‐capacity storage to replace hard disk drives, fuelling the expansion of the global storage memory market. As silicon‐based flash memories are approaching their fundamental limit, vertical stacking of multiple memory cell layers, innovative device concepts, and novel materials are being investigated. In this context, emerging 2D materials, such as graphene, transition metal dichalcogenides, and black phosphorous, offer a host of physical and chemical properties, which could both improve existing memory technologies and enable the next generation of low‐cost, flexible, and wearable storage devices. Herein, an overview of graphene and related 2D materials (GRMs) in different types of NVM cells is provided, including resistive random‐access, flash, magnetic and phase‐change memories. The physical and chemical mechanisms underlying the switching of GRM‐based memory devices studied in the last decade are discussed. Although at this stage most of the proof‐of‐concept devices investigated do not compete with state‐of‐the‐art devices, a number of promising technological advancements have emerged. Here, the most relevant material properties and device structures are analyzed, emphasizing opportunities and challenges toward the realization of practical NVM devices.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The pervasiveness of information technologies is generating an impressive amount of data, which need to be accessed very quickly. Nonvolatile memories (NVMs) are making inroads into high‐capacity storage to replace hard disk drives, fuelling the expansion of the global storage memory market. As silicon‐based flash memories are approaching their fundamental limit, vertical stacking of multiple memory cell layers, innovative device concepts, and novel materials are being investigated. In this context, emerging 2D materials, such as graphene, transition metal dichalcogenides, and black phosphorous, offer a host of physical and chemical properties, which could both improve existing memory technologies and enable the next generation of low‐cost, flexible, and wearable storage devices. Herein, an overview of graphene and related 2D materials (GRMs) in different types of NVM cells is provided, including resistive random‐access, flash, magnetic and phase‐change memories. The physical and chemical mechanisms underlying the switching of GRM‐based memory devices studied in the last decade are discussed. Although at this stage most of the proof‐of‐concept devices investigated do not compete with state‐of‐the‐art devices, a number of promising technological advancements have emerged. Here, the most relevant material properties and device structures are analyzed, emphasizing opportunities and challenges toward the realization of practical NVM devices. |
Schnoering, Gabriel; Rosales-Cabara, Yoseline; Wendehenne, Hugo; Canaguier-Durand, Antoine; Genet, Cyriaque Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles Article de journal Dans: PHYSICAL REVIEW APPLIED , 11 ( 034023), 2019. @article{Schnoering2019, title = {Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles}, author = {Gabriel Schnoering and Yoseline Rosales-Cabara and Hugo Wendehenne and Antoine Canaguier-Durand and Cyriaque Genet}, editor = {© 2019 American Physical Society}, doi = {DOI: 10.1103/PhysRevApplied.11.034023}, year = {2019}, date = {2019-03-08}, journal = {PHYSICAL REVIEW APPLIED }, volume = {11}, number = { 034023}, abstract = {We propose and evaluate a new type of optical force microscope based on a standing-wave optical trap. Our microscope, calibrated in situ and operating in a dynamic mode, is able to trap, without heating, a single metallic nanoparticle of 150 nm that acts as a highly sensitive probe for external radiation pressure. An Allan-deviation-based stability analysis of the setup yields an optimal 0.1-Hz measurement bandwidth over which the microscope is thermally limited. Over this bandwidth, and with a genuine sine-wave external drive, we demonstrate an optical force resolution down to 3 fN in water at room temperature with a dynamical range for force detection that covers almost 2 orders of magnitude. This resolution is reached in both the confined regime and the freely diffusing regime of the optical trap. In the latter, we measure induced displacements of 10−11 m on the trapped nanoparticle spatially confined within less than 25 nm along the optical axis.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We propose and evaluate a new type of optical force microscope based on a standing-wave optical trap. Our microscope, calibrated in situ and operating in a dynamic mode, is able to trap, without heating, a single metallic nanoparticle of 150 nm that acts as a highly sensitive probe for external radiation pressure. An Allan-deviation-based stability analysis of the setup yields an optimal 0.1-Hz measurement bandwidth over which the microscope is thermally limited. Over this bandwidth, and with a genuine sine-wave external drive, we demonstrate an optical force resolution down to 3 fN in water at room temperature with a dynamical range for force detection that covers almost 2 orders of magnitude. This resolution is reached in both the confined regime and the freely diffusing regime of the optical trap. In the latter, we measure induced displacements of 10−11 m on the trapped nanoparticle spatially confined within less than 25 nm along the optical axis. |
K, Muchowska; E, Chevallot-Beroux; J, Moran Recreating ancient metabolic pathways before enzymes. Article de journal Dans: Bioorganic & Medicinal Chemistry, 2019. @article{K2019, title = {Recreating ancient metabolic pathways before enzymes.}, author = {Muchowska K and Chevallot-Beroux E and Moran J}, editor = {Copyright © 2019. Published by Elsevier Ltd}, url = {https://www.sciencedirect.com/science/article/pii/S0968089619300033?via%3Dihub}, doi = {https://doi.org/10.1016/j.bmc.2019.03.012}, year = {2019}, date = {2019-03-07}, journal = {Bioorganic & Medicinal Chemistry}, abstract = {The biochemistry of all living organisms uses complex, enzyme-catalyzed metabolic reaction networks. Yet, at life's origins, enzymes had not yet evolved. Therefore, it has been postulated that non-enzymatic metabolic pathways predated their enzymatic counterparts. In this account article, we describe our recent work to evaluate whether two ancient carbon fixation pathways, the rTCA (reductive tricarboxylic acid) cycle and the reductive AcCoA (Wood-Ljungdahl) pathway, could have operated without enzymes and therefore have originated as prebiotic chemistry. We also describe the discovery of an Fe2+-promoted complex reaction network that may represent a prebiotic predecessor to the TCA and glyoxylate cycles. The collective results support the idea that most central metabolic pathways could have roots in prebiotic chemistry.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The biochemistry of all living organisms uses complex, enzyme-catalyzed metabolic reaction networks. Yet, at life's origins, enzymes had not yet evolved. Therefore, it has been postulated that non-enzymatic metabolic pathways predated their enzymatic counterparts. In this account article, we describe our recent work to evaluate whether two ancient carbon fixation pathways, the rTCA (reductive tricarboxylic acid) cycle and the reductive AcCoA (Wood-Ljungdahl) pathway, could have operated without enzymes and therefore have originated as prebiotic chemistry. We also describe the discovery of an Fe2+-promoted complex reaction network that may represent a prebiotic predecessor to the TCA and glyoxylate cycles. The collective results support the idea that most central metabolic pathways could have roots in prebiotic chemistry. |
Krystek, M; Pakulski, D; Patroniak, V; Górski, M; Szojda, L; Ciesielski, A; Samorì, P High‐Performance Graphene‐Based Cementitious Composites Article de journal Dans: ADVANCED SCIENCE, 6 (1801195), 2019. @article{Krystek2019, title = {High‐Performance Graphene‐Based Cementitious Composites}, author = {M. Krystek and D. Pakulski and V. Patroniak and M. Górski and L. Szojda and A. Ciesielski and P. Samorì}, editor = {Wiley Online Library }, url = { https://doi.org/10.1002/advs.201801195}, doi = {10.1002/advs.201801195}, year = {2019}, date = {2019-03-07}, journal = {ADVANCED SCIENCE}, volume = {6}, number = {1801195}, abstract = {This study reports on the development of a cementitious composite incorporating electrochemically exfoliated graphene (EEG). This hybrid functional material features significantly enhanced microstructure and mechanical properties, as well as unaffected workability; thus, it outperforms previously reported cementitious composites containing graphene derivatives. The manufacturing of the composite relies on a simple and efficient method that enables the uniform dispersion of EEG within cement matrix in the absence of surfactants. Different from graphene oxide, EEG is found to not agglomerate in cement alkaline environment, thereby not affecting the fluidity of cementitious composites. The addition of 0.05 wt% graphene content to ordinary Portland cement results in an increase up to 79%, 8%, and 9% for the tensile strength, compressive strength, and Young's modulus, respectively. Remarkably, it is found that the addition of EEG promotes the hydration reaction of both alite and belite, thus leading to the formation of a large fraction of 3CaO·2SiO2·3H2O (C‐S‐H) phase. These findings represent a major step forward toward the practical application of nanomaterials in civil engineering.}, keywords = {}, pubstate = {published}, tppubtype = {article} } This study reports on the development of a cementitious composite incorporating electrochemically exfoliated graphene (EEG). This hybrid functional material features significantly enhanced microstructure and mechanical properties, as well as unaffected workability; thus, it outperforms previously reported cementitious composites containing graphene derivatives. The manufacturing of the composite relies on a simple and efficient method that enables the uniform dispersion of EEG within cement matrix in the absence of surfactants. Different from graphene oxide, EEG is found to not agglomerate in cement alkaline environment, thereby not affecting the fluidity of cementitious composites. The addition of 0.05 wt% graphene content to ordinary Portland cement results in an increase up to 79%, 8%, and 9% for the tensile strength, compressive strength, and Young's modulus, respectively. Remarkably, it is found that the addition of EEG promotes the hydration reaction of both alite and belite, thus leading to the formation of a large fraction of 3CaO·2SiO2·3H2O (C‐S‐H) phase. These findings represent a major step forward toward the practical application of nanomaterials in civil engineering. |
Hou, Lili; Zhang, Xiaoyan; Cotella, Giovanni F; Carnicella, Giuseppe; Herder, Martin; Schmidt, Bernd M; Pätzel, Michael; andFranco Cacialli, Stefan Hecht; Samorì, Paolo Optically switchable organic light-emitting transistors Article de journal Dans: Nature Nanotechnology, 14 , p. 347-353, 2019. @article{Hou2019b, title = {Optically switchable organic light-emitting transistors}, author = {Lili Hou and Xiaoyan Zhang and Giovanni F Cotella and Giuseppe Carnicella and Martin Herder and Bernd M Schmidt and Michael Pätzel and Stefan Hecht andFranco Cacialli and Paolo Samorì }, editor = {Nature}, url = {https://www.nature.com/articles/s41565-019-0370-9}, doi = {10.1038/s41565-019-0370-9}, year = {2019}, date = {2019-02-18}, journal = {Nature Nanotechnology}, volume = {14}, pages = {347-353}, abstract = {Organic light-emitting transistors are pivotal components for emerging opto- and nanoelectronics applications, such as logic circuitries and smart displays. Within this technology sector, the integration of multiple functionalities in a single electronic device remains the key challenge. Here we show optically switchable organic light-emitting transistors fabricated through a judicious combination of light-emitting semiconductors and photochromic molecules. Irradiation of the solution-processed films at selected wavelengths enables the efficient and reversible tuning of charge transport and electroluminescence simultaneously, with a high degree of modulation (on/off ratios up to 500) in the three primary colours. Different emitting patterns can be written and erased through a non-invasive and mask-free process, on a length scale of a few micrometres in a single device, thereby rendering this technology potentially promising for optically gated highly integrated full-colour displays and active optical memory.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Organic light-emitting transistors are pivotal components for emerging opto- and nanoelectronics applications, such as logic circuitries and smart displays. Within this technology sector, the integration of multiple functionalities in a single electronic device remains the key challenge. Here we show optically switchable organic light-emitting transistors fabricated through a judicious combination of light-emitting semiconductors and photochromic molecules. Irradiation of the solution-processed films at selected wavelengths enables the efficient and reversible tuning of charge transport and electroluminescence simultaneously, with a high degree of modulation (on/off ratios up to 500) in the three primary colours. Different emitting patterns can be written and erased through a non-invasive and mask-free process, on a length scale of a few micrometres in a single device, thereby rendering this technology potentially promising for optically gated highly integrated full-colour displays and active optical memory. |
Chevallot-Beroux, Elodie; Ako, Ayuk M; Schmitt, Wolfgang; Twamley, Brendan; Moran, Joseph; Corinne, Boudon; Ruhlmannc, Laurent; Mameri, Samir Synthesis of new Mn19 analogues and their structural, electrochemical and catalytic properties Article de journal Dans: Dalton Transactions, (15), 2019. @article{Chevallot-Beroux2019, title = {Synthesis of new Mn19 analogues and their structural, electrochemical and catalytic properties }, author = { Elodie Chevallot-Beroux and Ayuk M. Ako and Wolfgang Schmitt and Brendan Twamley and Joseph Moran and Boudon Corinne and Laurent Ruhlmannc and Samir Mameri}, editor = {Royal Society of Chemistry}, doi = {10.1039/C8DT04807J}, year = {2019}, date = {2019-02-13}, journal = {Dalton Transactions}, number = {15}, abstract = {We report the synthesis and structural characterisation of new Mn19 and Mn18M analogues, [MnIII12MnII7(μ4-O)8(μ3-OCH3)2(μ3-Br)6(HLMe)12(MeOH)6]Br2 (2) and [MnIII12MnII6Sr(μ4-O8(μ3-Cl)8(HLMe)12(MeCN)6]Cl2 cluster (3), where H3LMe is 2,6-bis(hydroxymethyl)-p-cresol. The electrochemistry of 2 and 3 has been investigated and their activity as catalysts in the oxidation of benzyl alcohol has been evaluated. Selective oxidation of benzyl alcohol to benzaldehyde by O2 was achieved using 1 mol% of catalyst with conversions of 74% (2) and 60% (3) at 140 °C using TEMPO as a co-catalyst. No partial conversion of benzaldehyde to benzoic acid was observed. The results obtained revealed that different operative parameters – such as catalyst loading, temperature, time, solvent and the presence of molecular oxygen – played an important role in the selective oxidation of benzyl alcohol.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We report the synthesis and structural characterisation of new Mn19 and Mn18M analogues, [MnIII12MnII7(μ4-O)8(μ3-OCH3)2(μ3-Br)6(HLMe)12(MeOH)6]Br2 (2) and [MnIII12MnII6Sr(μ4-O8(μ3-Cl)8(HLMe)12(MeCN)6]Cl2 cluster (3), where H3LMe is 2,6-bis(hydroxymethyl)-p-cresol. The electrochemistry of 2 and 3 has been investigated and their activity as catalysts in the oxidation of benzyl alcohol has been evaluated. Selective oxidation of benzyl alcohol to benzaldehyde by O2 was achieved using 1 mol% of catalyst with conversions of 74% (2) and 60% (3) at 140 °C using TEMPO as a co-catalyst. No partial conversion of benzaldehyde to benzoic acid was observed. The results obtained revealed that different operative parameters – such as catalyst loading, temperature, time, solvent and the presence of molecular oxygen – played an important role in the selective oxidation of benzyl alcohol. |
Thomas, A; Lethuillier-Karl, L; K. Nagarajan, Vergauwe R M A; George, J; Chervy, T; Shalabney, A; Devaux, E; Genet, C; nd Ebbesen, Morana J T W Tilting a ground-state reactivity landscape by vibrational strong coupling Article de journal Dans: Science, 363 (6427), p. 615-619, 2019. @article{Thomas2019, title = {Tilting a ground-state reactivity landscape by vibrational strong coupling}, author = {A. Thomas and L. Lethuillier-Karl and K. Nagarajan, R. M. A. Vergauwe and J. George and T. Chervy and A. Shalabney and E. Devaux and C. Genet and J. Morana nd T. W. Ebbesen}, url = {https://science.sciencemag.org/content/363/6427/615.abstract}, doi = {DOI: 10.1126/science.aau7742 }, year = {2019}, date = {2019-02-08}, journal = {Science}, volume = {363}, number = {6427}, pages = {615-619}, abstract = {Many chemical methods have been developed to favor a particular product in transformations of compounds that have two or more reactive sites. We explored a different approach to site selectivity using vibrational strong coupling (VSC) between a reactant and the vacuum field of a microfluidic optical cavity. Specifically, we studied the reactivity of a compound bearing two possible silyl bond cleavage sites—Si–C and Si–O, respectively—as a function of VSC of three distinct vibrational modes in the dark. The results show that VSC can indeed tilt the reactivity landscape to favor one product over the other. Thermodynamic parameters reveal the presence of a large activation barrier and substantial changes to the activation entropy, confirming the modified chemical landscape under strong coupling.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Many chemical methods have been developed to favor a particular product in transformations of compounds that have two or more reactive sites. We explored a different approach to site selectivity using vibrational strong coupling (VSC) between a reactant and the vacuum field of a microfluidic optical cavity. Specifically, we studied the reactivity of a compound bearing two possible silyl bond cleavage sites—Si–C and Si–O, respectively—as a function of VSC of three distinct vibrational modes in the dark. The results show that VSC can indeed tilt the reactivity landscape to favor one product over the other. Thermodynamic parameters reveal the presence of a large activation barrier and substantial changes to the activation entropy, confirming the modified chemical landscape under strong coupling. |
Li, S L; Zhang, L; Zhong, X; Gobbi, M; Bertolazzi, S; Guo, W; Wu, B; Liu, Y; Xu, N; Niu, W; Hao, Y; Orgiu, E; Samori, P Nano-Subsidence-Assisted Precise Integration of Patterned Two-Dimensional Materials for High-Performance Photodetector Arrays Article de journal Dans: ACS Nano, 13 (2), p. 2654–2662, 2019. @article{Li2019, title = {Nano-Subsidence-Assisted Precise Integration of Patterned Two-Dimensional Materials for High-Performance Photodetector Arrays}, author = {S.L. Li and L. Zhang and X. Zhong and M. Gobbi and S. Bertolazzi and W. Guo and B. Wu and Y. Liu and N. Xu and W. Niu and Y. Hao and E. Orgiu and P. Samori}, editor = {ASC Publications}, url = {https://pubs.acs.org/doi/10.1021/acsnano.9b00889}, doi = {DOI: 10.1021/acsnano.9b00889}, year = {2019}, date = {2019-02-07}, journal = {ACS Nano}, volume = {13}, number = {2}, pages = {2654–2662}, abstract = {The spatially precise integration of arrays of micropatterned two-dimensional (2D) crystals onto three-dimensionally structured Si/SiO2 substrates represents an attractive, low-cost system-on-chip strategy toward the realization of extended functions in silicon microelectronics. However, the reliable integration of such atomically thin arrays on planar patterned surfaces has proven challenging due to their poor adhesion to underlying substrates, as ruled by weak van der Waals interactions. Here, we report on an integration method utilizing the flexibility of the atomically thin crystals and their physical subsidence in liquids, which enables the reliable fabrication of the micropatterned 2D materials/Si arrays. Our photodiode devices display peak sensitivity as high as 0.35 A/W and external quantum efficiency (EQE) of ∼90%. The nano-subsidence technique represents a viable path to on-chip integration of 2D crystals onto silicon for advanced microelectronics.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The spatially precise integration of arrays of micropatterned two-dimensional (2D) crystals onto three-dimensionally structured Si/SiO2 substrates represents an attractive, low-cost system-on-chip strategy toward the realization of extended functions in silicon microelectronics. However, the reliable integration of such atomically thin arrays on planar patterned surfaces has proven challenging due to their poor adhesion to underlying substrates, as ruled by weak van der Waals interactions. Here, we report on an integration method utilizing the flexibility of the atomically thin crystals and their physical subsidence in liquids, which enables the reliable fabrication of the micropatterned 2D materials/Si arrays. Our photodiode devices display peak sensitivity as high as 0.35 A/W and external quantum efficiency (EQE) of ∼90%. The nano-subsidence technique represents a viable path to on-chip integration of 2D crystals onto silicon for advanced microelectronics. |
D. Pakulski A. Gorczyński, Czepa Liu Ortolani Morandi Patroniak Ciesielski Samorì W Z L V V A P Novel Keplerate type polyoxometalate-surfactant-graphene hybrids as advanced electrode materials for supercapacitors Article de journal Dans: Energy Storage Materials, 17 (February 2019), p. p 186-193, 2019. @article{Pakulski2018, title = {Novel Keplerate type polyoxometalate-surfactant-graphene hybrids as advanced electrode materials for supercapacitors}, author = {D. Pakulski, A. Gorczyński, W. Czepa, Z. Liu, L. Ortolani, V. Morandi, V. Patroniak, A. Ciesielski, P. Samorì}, editor = {ELSEVIER}, doi = {https://doi.org/10.1016/j.ensm.2018.11.012}, year = {2019}, date = {2019-02-01}, journal = {Energy Storage Materials}, volume = {17}, number = {February 2019}, pages = {p 186-193}, abstract = {The development of novel materials for enhanced electrochemical energy storage applications, in particular for the fabrication of supercapacitors (SCs) displaying increased properties, is a milestone of both fundamental and technological relevance. Among nanostructured materials, polyoxometalates (POMs) combined with various carbon-based nanostructures represent a very promising class of hybrid systems for energy storage, yet, guidelines for their rational design and synthesis leading to high-performance SCs is still lacking. Here, we have produced a novel hybrid architecture based on Keplerate type POM (Mo132) functionalized with dodecyltrimethylammonium bromide (DTAB), which upon mixing with electrochemically exfoliated graphene (EEG) nanosheets results in the formation of porous 3D superstructures. Mo132-DTAB-EEG combines the redox activity of POMs and high electrical conductivity of graphene, all synergically mediated by the surfactant-assisted porosity enhancement, to form new electrode materials for SCs. Cyclic voltammetry and galvanostatic charge/discharge electrochemical studies on Mo132-DTAB-EEG performed in aqueous H2SO4 electrolyte revealed that the unique combination of these three components yields highly efficient energy storage materials. In particular, our highly porous hybrids system exhibits high specific capacitance of 65 F g−1 (93 F cm−3, 93mFcm−2) combined with excellent stability (99% of specific capacitance retained) after 5000 charge/discharge cycles at different current densities, overall displaying significantly improved performance compared to pristine electrochemically exfoliated graphene material. Strong non-covalent interactions between Keplerate type polyoxometalate Mo132-DTAB and graphene surface offer higher stability compared to other hybrid POM/carbon-based systems, and unique electrical properties of the multicomponent structure, thereby paving the way towards the development of novel, and potentially multifunctional, POM-based architectures to be exploited as SC electrode materials.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The development of novel materials for enhanced electrochemical energy storage applications, in particular for the fabrication of supercapacitors (SCs) displaying increased properties, is a milestone of both fundamental and technological relevance. Among nanostructured materials, polyoxometalates (POMs) combined with various carbon-based nanostructures represent a very promising class of hybrid systems for energy storage, yet, guidelines for their rational design and synthesis leading to high-performance SCs is still lacking. Here, we have produced a novel hybrid architecture based on Keplerate type POM (Mo132) functionalized with dodecyltrimethylammonium bromide (DTAB), which upon mixing with electrochemically exfoliated graphene (EEG) nanosheets results in the formation of porous 3D superstructures. Mo132-DTAB-EEG combines the redox activity of POMs and high electrical conductivity of graphene, all synergically mediated by the surfactant-assisted porosity enhancement, to form new electrode materials for SCs. Cyclic voltammetry and galvanostatic charge/discharge electrochemical studies on Mo132-DTAB-EEG performed in aqueous H2SO4 electrolyte revealed that the unique combination of these three components yields highly efficient energy storage materials. In particular, our highly porous hybrids system exhibits high specific capacitance of 65 F g−1 (93 F cm−3, 93mFcm−2) combined with excellent stability (99% of specific capacitance retained) after 5000 charge/discharge cycles at different current densities, overall displaying significantly improved performance compared to pristine electrochemically exfoliated graphene material. Strong non-covalent interactions between Keplerate type polyoxometalate Mo132-DTAB and graphene surface offer higher stability compared to other hybrid POM/carbon-based systems, and unique electrical properties of the multicomponent structure, thereby paving the way towards the development of novel, and potentially multifunctional, POM-based architectures to be exploited as SC electrode materials. |
Ye Wang Amine Slassi, Marc-Antoine Stoeckel Simone Bertolazzi Jerôme Cornil David Beljonne Paolo Samorì Doping of Monolayer Transition-Metal Dichalcogenides via Physisorption of Aromatic Solvent Molecules Article de journal Dans: J. Phys. Chem. Lett, 10 (3), p. 540-547, 2019. @article{Wang2019, title = {Doping of Monolayer Transition-Metal Dichalcogenides via Physisorption of Aromatic Solvent Molecules}, author = {Ye Wang, Amine Slassi, Marc-Antoine Stoeckel, Simone Bertolazzi, Jerôme Cornil, David Beljonne , Paolo Samorì}, editor = {Copyright © 2019 American Chemical Society }, url = {https://pubs.acs.org/doi/10.1021/acs.jpclett.8b03697}, doi = {DOI: 10.1021/acs.jpclett.8b03697}, year = {2019}, date = {2019-01-16}, journal = {J. Phys. Chem. Lett}, volume = {10}, number = {3}, pages = {540-547}, abstract = {Two-dimensional (2D) transition-metal dichalcogenides (TMDs) recently emerged as novel materials displaying a wide variety of physicochemical properties that render them unique scaffolds for high-performance (opto)electronics. The controlled physisorption of molecules on the TMD surface is a viable approach for tuning their optical and electronic properties. Solvents, made of small aromatic molecules, are frequently employed for the cleaning of the 2D materials or as a “dispersant” for their chemical functionalization with larger (macro)molecules, without considering their potential key effect in locally modifying the characteristics of 2D materials. In this work, we demonstrate how the electronic and optical properties of a mechanically exfoliated monolayer of MoS2 and WSe2 are modified when physically interacting with small aromatic molecules of common solvents. Low-temperature photoluminescence (PL) spectra recorded at 78 K revealed that physisorbed benzene derivatives could modulate the charge carrier density in monolayer TMDs, hence affecting the switching between a neutral exciton and trion (charged exciton). By combining experimental evidence with density functional theory calculations, we confirm that charge-transfer doping on TMDs depends not only on the difference in chemical potential between molecules and 2D materials but also on the thermodynamic stability of physisorption. Our results provide unambiguous evidences of the great potential of optical and electrical tuning of monolayer MoS2 and WSe2 by physisorption of small aromatic solvent molecules, which is highly relevant for both fundamental studies and device application purposes.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Two-dimensional (2D) transition-metal dichalcogenides (TMDs) recently emerged as novel materials displaying a wide variety of physicochemical properties that render them unique scaffolds for high-performance (opto)electronics. The controlled physisorption of molecules on the TMD surface is a viable approach for tuning their optical and electronic properties. Solvents, made of small aromatic molecules, are frequently employed for the cleaning of the 2D materials or as a “dispersant” for their chemical functionalization with larger (macro)molecules, without considering their potential key effect in locally modifying the characteristics of 2D materials. In this work, we demonstrate how the electronic and optical properties of a mechanically exfoliated monolayer of MoS2 and WSe2 are modified when physically interacting with small aromatic molecules of common solvents. Low-temperature photoluminescence (PL) spectra recorded at 78 K revealed that physisorbed benzene derivatives could modulate the charge carrier density in monolayer TMDs, hence affecting the switching between a neutral exciton and trion (charged exciton). By combining experimental evidence with density functional theory calculations, we confirm that charge-transfer doping on TMDs depends not only on the difference in chemical potential between molecules and 2D materials but also on the thermodynamic stability of physisorption. Our results provide unambiguous evidences of the great potential of optical and electrical tuning of monolayer MoS2 and WSe2 by physisorption of small aromatic solvent molecules, which is highly relevant for both fundamental studies and device application purposes. |
Witomska Samanta Liu Zhaoyang, Czepa Wlodzimierz Aliprandi Alessandro Pakulski Dawid Pawluc Piotr Ciesielski Artur Samori Paolo Graphene Oxide Hybrid with Sulfur–Nitrogen Polymer for High-Performance Pseudocapacitors Article de journal Dans: J. Am. Chem. Soc., 141 (1), p. 482-487, 2019. @article{, title = {Graphene Oxide Hybrid with Sulfur–Nitrogen Polymer for High-Performance Pseudocapacitors}, author = {Witomska Samanta , Liu Zhaoyang , Czepa, Wlodzimierz , Aliprandi, Alessandro , Pakulski, Dawid , Pawluc, Piotr , Ciesielski, Artur , Samori Paolo ,}, editor = {Copyright © 2019 American Chemical Society}, url = {https://pubs.acs.org/doi/10.1021/jacs.8b11181}, doi = {DOI: 10.1021/jacs.8b11181}, year = {2019}, date = {2019-01-09}, journal = {J. Am. Chem. Soc.}, volume = {141}, number = {1}, pages = {482-487}, abstract = {Toward the introduction of fast faradaic pseudocapacitive behavior and the increase of the specific capacitance of carbon-based electrodes, we covalently functionalized graphene oxide with a redox active thiourea-formaldehyde polymer, yielding a multifunctional hybrid system. The multiscale physical and chemical characterization of the novel 3-dimensional hybrid revealed high material porosity with high specific surface area (402 m2 g–1) and homogeneous element distribution. The presence of multiple functional groups comprising sulfur, nitrogen, and oxygen provide additional contribution of Faradaic redox reaction in supercapacity performance, leading to a high effective electrochemical pseudocapacitance. Significantly, our graphene-based 3-dimensional thiourea-formaldehyde hybrid exhibited specific capacitance as high as 400 F g–1, areal capacitance of 160 mF cm–2, and an energy density of 11.1 mWh cm–3 at scan rate of 1 mV s–1 with great capacitance retention (100%) after 5000 cycles at scan rate of 100 mV s–}, keywords = {}, pubstate = {published}, tppubtype = {article} } Toward the introduction of fast faradaic pseudocapacitive behavior and the increase of the specific capacitance of carbon-based electrodes, we covalently functionalized graphene oxide with a redox active thiourea-formaldehyde polymer, yielding a multifunctional hybrid system. The multiscale physical and chemical characterization of the novel 3-dimensional hybrid revealed high material porosity with high specific surface area (402 m2 g–1) and homogeneous element distribution. The presence of multiple functional groups comprising sulfur, nitrogen, and oxygen provide additional contribution of Faradaic redox reaction in supercapacity performance, leading to a high effective electrochemical pseudocapacitance. Significantly, our graphene-based 3-dimensional thiourea-formaldehyde hybrid exhibited specific capacitance as high as 400 F g–1, areal capacitance of 160 mF cm–2, and an energy density of 11.1 mWh cm–3 at scan rate of 1 mV s–1 with great capacitance retention (100%) after 5000 cycles at scan rate of 100 mV s– |
Chang-Bo Huang; Samanta, Witomska; Alessandro Aliprandi; Marc-Antoine Stoeckel; Massimo Bonini; Artur Ciesielski* & Paolo Samorì* Molecule–Graphene Hybrid Materials with Tunable Mechanoresponse: Highly Sensitive Pressure Sensors for Health Monitoring Article de journal Dans: Advanced Materials, 31(1), 1804600, 2019. @article{Huang2018, title = {Molecule–Graphene Hybrid Materials with Tunable Mechanoresponse: Highly Sensitive Pressure Sensors for Health Monitoring}, author = {Chang-Bo Huang; Samanta, Witomska; Alessandro Aliprandi; Marc-Antoine Stoeckel; Massimo Bonini; Artur Ciesielski* & Paolo Samorì*}, editor = {Wiley Online Library }, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201804600}, doi = {10.1002/adma.201804600}, year = {2019}, date = {2019-01-04}, journal = {Advanced Materials, 31(1), 1804600}, abstract = {The development of pressure sensors is crucial for the implementation of electronic skins and for health monitoring integrated into novel wearable devices. Tremendous effort is devoted toward improving their sensitivity, e.g., by employing microstructured electrodes or active materials through cumbersome processes. Here, a radically new type of piezoresistive pressure sensor based on a millefeuille‐like architecture of reduced graphene oxide (rGO) intercalated by covalently tethered molecular pillars holding on‐demand mechanical properties are fabricated. By applying a tiny pressure to the multilayer structure, the electron tunnelling ruling the charge transport between successive rGO sheets yields a colossal decrease in the material's electrical resistance. Significantly, the intrinsic rigidity of the molecular pillars employed enables the fine‐tuning of the sensor's sensitivity, reaching sensitivities as high as 0.82 kPa−1 in the low pressure region (0–0.6 kPa), with short response times (≈24 ms) and detection limit (7 Pa). The pressure sensors enable efficient heartbeat monitoring and can be easily transformed into a matrix capable of providing a 3D map of the pressure exerted by different objects. }, keywords = {}, pubstate = {published}, tppubtype = {article} } The development of pressure sensors is crucial for the implementation of electronic skins and for health monitoring integrated into novel wearable devices. Tremendous effort is devoted toward improving their sensitivity, e.g., by employing microstructured electrodes or active materials through cumbersome processes. Here, a radically new type of piezoresistive pressure sensor based on a millefeuille‐like architecture of reduced graphene oxide (rGO) intercalated by covalently tethered molecular pillars holding on‐demand mechanical properties are fabricated. By applying a tiny pressure to the multilayer structure, the electron tunnelling ruling the charge transport between successive rGO sheets yields a colossal decrease in the material's electrical resistance. Significantly, the intrinsic rigidity of the molecular pillars employed enables the fine‐tuning of the sensor's sensitivity, reaching sensitivities as high as 0.82 kPa−1 in the low pressure region (0–0.6 kPa), with short response times (≈24 ms) and detection limit (7 Pa). The pressure sensors enable efficient heartbeat monitoring and can be easily transformed into a matrix capable of providing a 3D map of the pressure exerted by different objects. |
2018 |
Agostino Galanti; Valentin, Diez-Cabanes; Jasmin Santoro; Michal Valášek; Andrea Minoia; Marcel Mayor; Jérôme Cornil; Paolo Samorì; Electronic Decoupling in C3-Symmetrical Light-Responsive Tris(Azobenzene) Scaffolds: Self-Assembly and Multiphotochromism Article de journal Dans: J. Am. Chem. Soc., 2018, 140 (47), 16062–16070, 2018. @article{Galanti2018, title = {Electronic Decoupling in C3-Symmetrical Light-Responsive Tris(Azobenzene) Scaffolds: Self-Assembly and Multiphotochromism}, author = {Agostino, Galanti; Valentin, Diez-Cabanes; Jasmin, Santoro; Michal, Valášek; Andrea, Minoia; Marcel, Mayor; Jérôme, Cornil; Paolo, Samorì;}, editor = {ACS Publcation}, url = {https://pubs.acs.org/doi/10.1021/jacs.8b06324}, doi = {10.1021/jacs.8b06324}, year = {2018}, date = {2018-10-31}, journal = {J. Am. Chem. Soc., 2018, 140 (47), 16062–16070}, abstract = {We report the synthesis of a novel C3-symmetrical multiphotochromic molecule bearing three azobenzene units at positions 1, 3, 5 of the central phenyl ring. The unique geometrical design of such a rigid scaffold enables the electronic decoupling of the azobenzene moieties to guarantee their simultaneous isomerization. Photoswitching of all azobenzenes in solution was demonstrated by means of UV–vis absorption spectroscopy and high performance liquid chromatography (HPLC) analysis. Scanning tunneling microscopy investigations at the solid–liquid interface, corroborated by molecular modeling, made it possible to unravel the dynamic self-assembly of such systems into ordered supramolecular architectures, by visualizing and identifying the patterns resulting from three different isomers, thereby demonstrating that the multiphotochromism is retained when the molecules are confined in two dimensions.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We report the synthesis of a novel C3-symmetrical multiphotochromic molecule bearing three azobenzene units at positions 1, 3, 5 of the central phenyl ring. The unique geometrical design of such a rigid scaffold enables the electronic decoupling of the azobenzene moieties to guarantee their simultaneous isomerization. Photoswitching of all azobenzenes in solution was demonstrated by means of UV–vis absorption spectroscopy and high performance liquid chromatography (HPLC) analysis. Scanning tunneling microscopy investigations at the solid–liquid interface, corroborated by molecular modeling, made it possible to unravel the dynamic self-assembly of such systems into ordered supramolecular architectures, by visualizing and identifying the patterns resulting from three different isomers, thereby demonstrating that the multiphotochromism is retained when the molecules are confined in two dimensions. |
Jorge Leira-Iglesias Alessandra Tassoni, Takuji Adachi Michael Stich Thomas Hermans M Oscillations, travelling fronts and patterns in a supramolecular system Article de journal Dans: 2018, ISSN: 1748-3387, 1748-3395. @article{Hermans2018, title = {Oscillations, travelling fronts and patterns in a supramolecular system}, author = {Jorge Leira-Iglesias, Alessandra Tassoni, Takuji Adachi, Michael Stich,Thomas M. Hermans}, editor = {Nature Nanotechnology}, url = {http://www.nature.com/articles/s41565-018-0270-4}, doi = {10.1038/s41565-018-0270-4}, issn = {1748-3387, 1748-3395}, year = {2018}, date = {2018-10-15}, abstract = {Supramolecular polymers, such as microtubules, operate under non-equilibrium conditions to drive crucial functions in cells, such as motility, division and organelle transport1. In vivo and in vitro size oscillations of individual microtubules2,3 (dynamic instabilities) and collective oscillations4 have been observed. In addition, dynamic spatial structures, like waves and polygons, can form in non-stirred systems5. Here we describe an artificial supramolecular polymer made of a perylene diimide derivative that displays oscillations, travelling fronts and centimetre-scale self-organized patterns when pushed far from equilibrium by chemical fuels. Oscillations arise from a positive feedback due to nucleation–elongation–fragmentation, and a negative feedback due to size-dependent depolymerization. Travelling fronts and patterns form due to self-assembly induced density differences that cause system-wide convection. In our system, the species responsible for the nonlinear dynamics and those that self-assemble are one and the same. In contrast, other reported oscillating assemblies formed by vesicles6, micelles7 or particles8 rely on the combination of a known chemical oscillator and a stimuli-responsive system, either by communication through the solvent (for example, by changing pH7,8,9), or by anchoring one of the species covalently (for example, a Belousov–Zhabotinsky catalyst6,10). The design of self-oscillating supramolecular polymers and large-scale dissipative structures brings us closer to the creation of more life-like materials11 that respond to external stimuli similarly to living cells, or to creating artificial autonomous chemical robots12.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Supramolecular polymers, such as microtubules, operate under non-equilibrium conditions to drive crucial functions in cells, such as motility, division and organelle transport1. In vivo and in vitro size oscillations of individual microtubules2,3 (dynamic instabilities) and collective oscillations4 have been observed. In addition, dynamic spatial structures, like waves and polygons, can form in non-stirred systems5. Here we describe an artificial supramolecular polymer made of a perylene diimide derivative that displays oscillations, travelling fronts and centimetre-scale self-organized patterns when pushed far from equilibrium by chemical fuels. Oscillations arise from a positive feedback due to nucleation–elongation–fragmentation, and a negative feedback due to size-dependent depolymerization. Travelling fronts and patterns form due to self-assembly induced density differences that cause system-wide convection. In our system, the species responsible for the nonlinear dynamics and those that self-assemble are one and the same. In contrast, other reported oscillating assemblies formed by vesicles6, micelles7 or particles8 rely on the combination of a known chemical oscillator and a stimuli-responsive system, either by communication through the solvent (for example, by changing pH7,8,9), or by anchoring one of the species covalently (for example, a Belousov–Zhabotinsky catalyst6,10). The design of self-oscillating supramolecular polymers and large-scale dissipative structures brings us closer to the creation of more life-like materials11 that respond to external stimuli similarly to living cells, or to creating artificial autonomous chemical robots12. |
Uzunov, N M; Melendez-Alafort, L; Bello, M; Cicoria, G; Zagni, F; De Nardo, L; Selva, A; Mou, L; Rossi-Alvarez, C; Pupillo, G; Di Domenico, G; Uccelli, L; Boschi, A; Groppi, F; Salvini, A; Taibi, A; Duatti, A; Martini, P; Pasquali, M; Loriggiola, M; Marengo, M; Strada, L; Manenti, S; Rosato, A; Esposito, J Radioisotopic purity and imaging properties of cyclotron-produced Tc-99m using direct Mo-100(p,2n) reaction Article de journal Dans: PHYSICS IN MEDICINE AND BIOLOGY, 63 (18), 2018, ISSN: 0031-9155. @article{uzunov_radioisotopic_2018, title = {Radioisotopic purity and imaging properties of cyclotron-produced Tc-99m using direct Mo-100(p,2n) reaction}, author = {Uzunov, N. M. and Melendez-Alafort, L. and Bello, M. and Cicoria, G. and Zagni, F. and De Nardo, L. and Selva, A. and Mou, L. and Rossi-Alvarez, C. and Pupillo, G. and Di Domenico, G. and Uccelli, L. and Boschi, A. and Groppi, F. and Salvini, A. and Taibi, A. and Duatti, A. and Martini, P. and Pasquali, M. and Loriggiola, M. and Marengo, M. and Strada, L. and Manenti, S. and Rosato, A. and Esposito, J.}, doi = {10.1088/1361-6560/aadc88}, issn = {0031-9155}, year = {2018}, date = {2018-09-01}, journal = {PHYSICS IN MEDICINE AND BIOLOGY}, volume = {63}, number = {18}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Gobbi, Marco ; Bonacchi, Sara ; Lian, Jian X; Vercouter, Alexandre ; Bertolazzi, Simone ; Zyska, Bjoern ; Timpel, Melanie ; Tatti, Roberta ; Olivier, Yoann ; Hecht, Stefan ; Nardi, Marco V; Beljonne, David ; Orgiu, Emanuele ; Samori, Paolo Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics (vol 9, 3689, 2018) Article de journal Dans: NATURE COMMUNICATIONS, 9 , 2018, ISSN: 2041-1723. @article{gobbi_collective_2018-1, title = {Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics (vol 9, 3689, 2018)}, author = {Gobbi, Marco and Bonacchi, Sara and Lian, Jian X. and Vercouter, Alexandre and Bertolazzi, Simone and Zyska, Bjoern and Timpel, Melanie and Tatti, Roberta and Olivier, Yoann and Hecht, Stefan and Nardi, Marco V. and Beljonne, David and Orgiu, Emanuele and Samori, Paolo}, doi = {10.1038/s41467-018-05541-6}, issn = {2041-1723}, year = {2018}, date = {2018-09-01}, journal = {NATURE COMMUNICATIONS}, volume = {9}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Bertolazzi, Simone ; Gobbi, Marco ; Zhao, Yuda ; Backes, Claudia ; Samori, Paolo Molecular chemistry approaches for tuning the properties of two-dimensional transition metal dichalcogenides Article de journal Dans: CHEMICAL SOCIETY REVIEWS, 47 (17), p. 6845–6888, 2018, ISSN: 0306-0012. @article{bertolazzi_molecular_2018, title = {Molecular chemistry approaches for tuning the properties of two-dimensional transition metal dichalcogenides}, author = {Bertolazzi, Simone and Gobbi, Marco and Zhao, Yuda and Backes, Claudia and Samori, Paolo}, doi = {10.1039/c8cs00169c}, issn = {0306-0012}, year = {2018}, date = {2018-09-01}, journal = {CHEMICAL SOCIETY REVIEWS}, volume = {47}, number = {17}, pages = {6845--6888}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Verduci, Tindara ; Chaumy, Guillaume ; Dayen, Jean-Francois ; Leclerc, Nicolas ; Devaux, Eloise ; Stoeckel, Marc-Antoine ; Orgiu, Emanuele ; Samori, Paolo ; Doudin, Bernard Current crowding issues on nanoscale planar organic transistors for spintronic applications Article de journal Dans: NANOTECHNOLOGY, 29 (36), 2018, ISSN: 0957-4484. @article{verduci_current_2018, title = {Current crowding issues on nanoscale planar organic transistors for spintronic applications}, author = {Verduci, Tindara and Chaumy, Guillaume and Dayen, Jean-Francois and Leclerc, Nicolas and Devaux, Eloise and Stoeckel, Marc-Antoine and Orgiu, Emanuele and Samori, Paolo and Doudin, Bernard}, doi = {10.1088/1361-6528/aacc22}, issn = {0957-4484}, year = {2018}, date = {2018-09-01}, journal = {NANOTECHNOLOGY}, volume = {29}, number = {36}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Richmond, Edward ; Yi, Jing ; Vukovic, Vuk D; Sajadi, Fatima ; Rowley, Christopher N; Moran, Joseph Ring-opening hydroarylation of monosubstituted cyclopropanes enabled by hexafluoroisopropanol Article de journal Dans: CHEMICAL SCIENCE, 9 (30), p. 6411–6416, 2018, ISSN: 2041-6520. @article{richmond_ring-opening_2018, title = {Ring-opening hydroarylation of monosubstituted cyclopropanes enabled by hexafluoroisopropanol}, author = {Richmond, Edward and Yi, Jing and Vukovic, Vuk D. and Sajadi, Fatima and Rowley, Christopher N. and Moran, Joseph}, doi = {10.1039/c8sc02126k}, issn = {2041-6520}, year = {2018}, date = {2018-08-01}, journal = {CHEMICAL SCIENCE}, volume = {9}, number = {30}, pages = {6411--6416}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
El Garah, Mohamed ; Cook, Timothy R; Sepehrpour, Hajar ; Ciesielski, Artur ; Stang, Peter J; Samori, Paolo Concentration-dependent supramolecular patterns of C-3 and C-2 symmetric molecules at the solid/liquid interface Article de journal Dans: COLLOIDS AND SURFACES B-BIOINTERFACES, 168 , p. 211–216, 2018, ISSN: 0927-7765. @article{el_garah_concentration-dependent_2018, title = {Concentration-dependent supramolecular patterns of C-3 and C-2 symmetric molecules at the solid/liquid interface}, author = {El Garah, Mohamed and Cook, Timothy R. and Sepehrpour, Hajar and Ciesielski, Artur and Stang, Peter J. and Samori, Paolo}, doi = {10.1016/j.colsurfb.2017.11.065}, issn = {0927-7765}, year = {2018}, date = {2018-08-01}, journal = {COLLOIDS AND SURFACES B-BIOINTERFACES}, volume = {168}, pages = {211--216}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Atoini, Youssef ; Prasetyanto, Eko Adi ; Chen, Pengkun ; Silvestrini, Simone ; Harrowfield, Jack ; De Cola, Luisa Luminescence of Amphiphilic Pt-II Complexes Controlled by Confinement Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (46), p. 12054–12060, 2018, ISSN: 0947-6539. @article{atoini_luminescence_2018, title = {Luminescence of Amphiphilic Pt-II Complexes Controlled by Confinement}, author = {Atoini, Youssef and Prasetyanto, Eko Adi and Chen, Pengkun and Silvestrini, Simone and Harrowfield, Jack and De Cola, Luisa}, doi = {10.1002/chem.201802743}, issn = {0947-6539}, year = {2018}, date = {2018-08-01}, journal = {CHEMISTRY-A EUROPEAN JOURNAL}, volume = {24}, number = {46}, pages = {12054--12060}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Mengozzi, Luca ; El Garah, Mohamed ; Gualandi, Andrea ; Iurlo, Matteo ; Fiorani, Andrea ; Ciesielski, Artur ; Marcaccio, Massimo ; Paolucci, Francesco ; Samori, Paolo ; Cozzi, Pier Giorgio Phenoxyaluminum(salophen) Scaffolds: Synthesis, Electrochemical Properties, and Self-Assembly at Surfaces of Multifunctional Systems Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (46), p. 11954–11960, 2018, ISSN: 0947-6539. @article{mengozzi_phenoxyaluminumsalophen_2018, title = {Phenoxyaluminum(salophen) Scaffolds: Synthesis, Electrochemical Properties, and Self-Assembly at Surfaces of Multifunctional Systems}, author = {Mengozzi, Luca and El Garah, Mohamed and Gualandi, Andrea and Iurlo, Matteo and Fiorani, Andrea and Ciesielski, Artur and Marcaccio, Massimo and Paolucci, Francesco and Samori, Paolo and Cozzi, Pier Giorgio}, doi = {10.1002/chem.201801118}, issn = {0947-6539}, year = {2018}, date = {2018-08-01}, journal = {CHEMISTRY-A EUROPEAN JOURNAL}, volume = {24}, number = {46}, pages = {11954--11960}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Ovchinnikov, Victor ; Stone, Tracy A; Deber, Charles M; Karplus, Martin Structure of the EmrE multidrug transporter and its use for inhibitor peptide design Article de journal Dans: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 115 (34), p. E7932–E7941, 2018, ISSN: 0027-8424. @article{ovchinnikov_structure_2018, title = {Structure of the EmrE multidrug transporter and its use for inhibitor peptide design}, author = {Ovchinnikov, Victor and Stone, Tracy A. and Deber, Charles M. and Karplus, Martin}, doi = {10.1073/pnas.1802177115}, issn = {0027-8424}, year = {2018}, date = {2018-08-01}, journal = {PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA}, volume = {115}, number = {34}, pages = {E7932--E7941}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Spitzer, Daniel ; Marichez, Vincent ; Formon, Georges J M; Besenius, Pol ; Hermans, Thomas M Surface-Assisted Self-Assembly of a Hydrogel by Proton Diffusion Article de journal Dans: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 57 (35), p. 11349–11353, 2018, ISSN: 1433-7851. @article{spitzer_surface-assisted_2018, title = {Surface-Assisted Self-Assembly of a Hydrogel by Proton Diffusion}, author = {Spitzer, Daniel and Marichez, Vincent and Formon, Georges J. M. and Besenius, Pol and Hermans, Thomas M.}, doi = {10.1002/anie.201806668}, issn = {1433-7851}, year = {2018}, date = {2018-08-01}, journal = {ANGEWANDTE CHEMIE-INTERNATIONAL EDITION}, volume = {57}, number = {35}, pages = {11349--11353}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Naydenov, Borislav ; Torsney, Samuel ; Bonilla, Alejandro Santana ; El Garah, Mohamed ; Ciesielski, Artur ; Gualandi, Andrea ; Mengozzi, Luca ; Cozzi, Pier Giorgio ; Gutierrez, Rafael ; Samori, Paolo ; Cuniberti, Gianaurelio ; Boland, John J Self-Assembled Two-Dimensional Supramolecular Networks Characterized by Scanning Tunneling Microscopy and Spectroscopy in Air and under Vacuum Article de journal Dans: LANGMUIR, 34 (26), p. 7698–7707, 2018, ISSN: 0743-7463. @article{naydenov_self-assembled_2018, title = {Self-Assembled Two-Dimensional Supramolecular Networks Characterized by Scanning Tunneling Microscopy and Spectroscopy in Air and under Vacuum}, author = {Naydenov, Borislav and Torsney, Samuel and Bonilla, Alejandro Santana and El Garah, Mohamed and Ciesielski, Artur and Gualandi, Andrea and Mengozzi, Luca and Cozzi, Pier Giorgio and Gutierrez, Rafael and Samori, Paolo and Cuniberti, Gianaurelio and Boland, John J.}, doi = {10.1021/acs.langmuir.8b01374}, issn = {0743-7463}, year = {2018}, date = {2018-07-01}, journal = {LANGMUIR}, volume = {34}, number = {26}, pages = {7698--7707}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Dhers, Sebastien ; Mondal, Abhishake ; Aguila, David ; Ramirez, Juan ; Vela, Sergi ; Dechambenoit, Pierre ; Rouzieres, Mathieu ; Nitschke, Jonathan R; Clerac, Rodolphe ; Lehn, Jean-Marie Spin State Chemistry: Modulation of Ligand pK(a) by Spin State Switching in a [2x2] Iron(II) Grid-Type Complex Article de journal Dans: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (26), p. 8218–8227, 2018, ISSN: 0002-7863. @article{dhers_spin_2018, title = {Spin State Chemistry: Modulation of Ligand pK(a) by Spin State Switching in a [2x2] Iron(II) Grid-Type Complex}, author = {Dhers, Sebastien and Mondal, Abhishake and Aguila, David and Ramirez, Juan and Vela, Sergi and Dechambenoit, Pierre and Rouzieres, Mathieu and Nitschke, Jonathan R. and Clerac, Rodolphe and Lehn, Jean-Marie}, doi = {10.1021/jacs.8b03735}, issn = {0002-7863}, year = {2018}, date = {2018-07-01}, journal = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, volume = {140}, number = {26}, pages = {8218--8227}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Boehringer, Regis ; Kieffer, Bruno ; Torbeev, Vladimir Total chemical synthesis and biophysical properties of a designed soluble 24 kDa amyloid analogue Article de journal Dans: CHEMICAL SCIENCE, 9 (25), p. 5594–5599, 2018, ISSN: 2041-6520. @article{boehringer_total_2018, title = {Total chemical synthesis and biophysical properties of a designed soluble 24 kDa amyloid analogue}, author = {Boehringer, Regis and Kieffer, Bruno and Torbeev, Vladimir}, doi = {10.1039/c8sc01790e}, issn = {2041-6520}, year = {2018}, date = {2018-07-01}, journal = {CHEMICAL SCIENCE}, volume = {9}, number = {25}, pages = {5594--5599}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Anichini, Cosimo ; Czepa, Wlodzimierz ; Pakulski, Dawid ; Aliprandi, Alessandro ; Ciesielski, Artur ; Samori, Paolo Chemical sensing with 2D materials Article de journal Dans: CHEMICAL SOCIETY REVIEWS, 47 (13), p. 4860–4908, 2018, ISSN: 0306-0012. @article{anichini_chemical_2018, title = {Chemical sensing with 2D materials}, author = {Anichini, Cosimo and Czepa, Wlodzimierz and Pakulski, Dawid and Aliprandi, Alessandro and Ciesielski, Artur and Samori, Paolo}, doi = {10.1039/c8cs00417j}, issn = {0306-0012}, year = {2018}, date = {2018-07-01}, journal = {CHEMICAL SOCIETY REVIEWS}, volume = {47}, number = {13}, pages = {4860--4908}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Samori, Paolo ; Biscarini, Fabio Nanomaterials properties tuned by their environment: integrating supramolecular concepts into sensing devices Article de journal Dans: CHEMICAL SOCIETY REVIEWS, 47 (13), p. 4675–4676, 2018, ISSN: 0306-0012. @article{samori_nanomaterials_2018, title = {Nanomaterials properties tuned by their environment: integrating supramolecular concepts into sensing devices}, author = {Samori, Paolo and Biscarini, Fabio}, doi = {10.1039/c8cs90066c}, issn = {0306-0012}, year = {2018}, date = {2018-07-01}, journal = {CHEMICAL SOCIETY REVIEWS}, volume = {47}, number = {13}, pages = {4675--4676}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Gobbi, Marco ; Bonacchi, Sara ; Lian, Jian X; Vercouter, Alexandre ; Bertolazzi, Simone ; Zyska, Bjoern ; Timpel, Melanie ; Tatti, Roberta ; Olivier, Yoann ; Hecht, Stefan ; Nardi, Marco V; Beljonne, David ; Orgiu, Emanuele ; Samori, Paolo Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics Article de journal Dans: NATURE COMMUNICATIONS, 9 , 2018, ISSN: 2041-1723. @article{gobbi_collective_2018, title = {Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics}, author = {Gobbi, Marco and Bonacchi, Sara and Lian, Jian X. and Vercouter, Alexandre and Bertolazzi, Simone and Zyska, Bjoern and Timpel, Melanie and Tatti, Roberta and Olivier, Yoann and Hecht, Stefan and Nardi, Marco V. and Beljonne, David and Orgiu, Emanuele and Samori, Paolo}, doi = {10.1038/s41467-018-04932-z}, issn = {2041-1723}, year = {2018}, date = {2018-07-01}, journal = {NATURE COMMUNICATIONS}, volume = {9}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
El Hage, Krystel ; Hedin, Florent ; Gupta, Prashant K; Meuwly, Markus ; Karplus, Martin Valid molecular dynamics simulations of human hemoglobin require a surprisingly large box size Article de journal Dans: ELIFE, 7 , 2018, ISSN: 2050-084X. @article{el_hage_valid_2018, title = {Valid molecular dynamics simulations of human hemoglobin require a surprisingly large box size}, author = {El Hage, Krystel and Hedin, Florent and Gupta, Prashant K. and Meuwly, Markus and Karplus, Martin}, doi = {10.7554/eLife.35560}, issn = {2050-084X}, year = {2018}, date = {2018-07-01}, journal = {ELIFE}, volume = {7}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Zhang, Lei ; Pasthukova, Nadiia ; Yao, Yifan ; Zhong, Xiaolan ; Pavlica, Egon ; Bratina, Gvido ; Orgiu, Emanuele ; Samori, Paolo Self-Suspended Nanomesh Scaffold for Ultrafast Flexible Photodetectors Based on Organic Semiconducting Crystals Article de journal Dans: ADVANCED MATERIALS, 30 (28), 2018, ISSN: 0935-9648. @article{zhang_self-suspended_2018, title = {Self-Suspended Nanomesh Scaffold for Ultrafast Flexible Photodetectors Based on Organic Semiconducting Crystals}, author = {Zhang, Lei and Pasthukova, Nadiia and Yao, Yifan and Zhong, Xiaolan and Pavlica, Egon and Bratina, Gvido and Orgiu, Emanuele and Samori, Paolo}, doi = {10.1002/adma.201801181}, issn = {0935-9648}, year = {2018}, date = {2018-07-01}, journal = {ADVANCED MATERIALS}, volume = {30}, number = {28}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Trolez, Yann ; Finke, Aaron D; Silvestri, Fabio ; Monti, Filippo ; Ventura, Barbara ; Boudon, Corinne ; Gisselbrecht, Jean-Paul ; Schweizer, Bernd W; Sauvage, Jean-Pierre ; Armaroli, Nicola ; Diederich, Francois Unconventional Synthesis of a Cu-I Rotaxane with a Superacceptor Stopper: Ultrafast Excited-State Dynamics and Near-Infrared Luminescence Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (41), p. 10422–10433, 2018, ISSN: 0947-6539. @article{trolez_unconventional_2018, title = {Unconventional Synthesis of a Cu-I Rotaxane with a Superacceptor Stopper: Ultrafast Excited-State Dynamics and Near-Infrared Luminescence}, author = {Trolez, Yann and Finke, Aaron D. and Silvestri, Fabio and Monti, Filippo and Ventura, Barbara and Boudon, Corinne and Gisselbrecht, Jean-Paul and Schweizer, W. Bernd and Sauvage, Jean-Pierre and Armaroli, Nicola and Diederich, Francois}, doi = {10.1002/chem.201801161}, issn = {0947-6539}, year = {2018}, date = {2018-07-01}, journal = {CHEMISTRY-A EUROPEAN JOURNAL}, volume = {24}, number = {41}, pages = {10422--10433}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Drozdz, Wojciech ; Walczak, Anna ; Bessin, Yannick ; Gervais, Virginie ; Cao, Xiao-Yu ; Lehn, Jean-Marie ; Ulrich, Sebastien ; Stefankiewicz, Artur R Multivalent Metallosupramolecular Assemblies as Effective DNA Binding Agents Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (42), p. 10802–10811, 2018, ISSN: 0947-6539. @article{drozdz_multivalent_2018, title = {Multivalent Metallosupramolecular Assemblies as Effective DNA Binding Agents}, author = {Drozdz, Wojciech and Walczak, Anna and Bessin, Yannick and Gervais, Virginie and Cao, Xiao-Yu and Lehn, Jean-Marie and Ulrich, Sebastien and Stefankiewicz, Artur R.}, doi = {10.1002/chem.201801552}, issn = {0947-6539}, year = {2018}, date = {2018-07-01}, journal = {CHEMISTRY-A EUROPEAN JOURNAL}, volume = {24}, number = {42}, pages = {10802--10811}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Kovaricek, Petr ; Cebecauer, Marek ; Neburkova, Jitka ; Barton, Jan ; Fridrichova, Michaela ; Drogowska, Karolina A; Cigler, Petr ; Lehn, Jean-Marie ; Kalbac, Martin Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds Article de journal Dans: ACS NANO, 12 (7), p. 7141–7147, 2018, ISSN: 1936-0851. @article{kovaricek_proton-gradient-driven_2018, title = {Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds}, author = {Kovaricek, Petr and Cebecauer, Marek and Neburkova, Jitka and Barton, Jan and Fridrichova, Michaela and Drogowska, Karolina A. and Cigler, Petr and Lehn, Jean-Marie and Kalbac, Martin}, doi = {10.1021/acsnano.8b03015}, issn = {1936-0851}, year = {2018}, date = {2018-07-01}, journal = {ACS NANO}, volume = {12}, number = {7}, pages = {7141--7147}, abstract = {Manipulating nanoscopic objects by external stimuli is the cornerstone of nanoscience. Here, we report the implementation of dynamic covalent chemistry in the reversible binding and directional motion of fluorescent nanodiamond particles at a functionalized graphene surface via imine linkages. The dynamic connections allow for controlling the formation and rupture of these linkages by external stimuli. By introduction of pH gradients, the nanoparticles are driven to move along the gradient due to the different rates of the imine condensation and hydrolysis in the two environments. The multivalent nature of the particle-to-surface connection ensures that particles remain attached to the surface, whereas its dynamic character allows for exchange reaction, thus leading to displacement yet bound behavior in two-dimensional space. These results open a pathway for thermodynamically controlled manipulation of objects on the nanoscale.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Manipulating nanoscopic objects by external stimuli is the cornerstone of nanoscience. Here, we report the implementation of dynamic covalent chemistry in the reversible binding and directional motion of fluorescent nanodiamond particles at a functionalized graphene surface via imine linkages. The dynamic connections allow for controlling the formation and rupture of these linkages by external stimuli. By introduction of pH gradients, the nanoparticles are driven to move along the gradient due to the different rates of the imine condensation and hydrolysis in the two environments. The multivalent nature of the particle-to-surface connection ensures that particles remain attached to the surface, whereas its dynamic character allows for exchange reaction, thus leading to displacement yet bound behavior in two-dimensional space. These results open a pathway for thermodynamically controlled manipulation of objects on the nanoscale. |
Graf, Ernest ; Harrowfield, Jack ; Kintzinger, Jean-Pierre ; Lehn, Jean-Marie ; Le Moigne, Jacques ; Rissanen, Kari Protonation of a Spherical Macrotricyclic Tetramine: Water Inclusion, Allosteric Effect, and Cooperativity Article de journal Dans: CHEMPLUSCHEM, 83 (7, SI), p. 605–611, 2018, ISSN: 2192-6506. @article{graf_protonation_2018, title = {Protonation of a Spherical Macrotricyclic Tetramine: Water Inclusion, Allosteric Effect, and Cooperativity}, author = {Graf, Ernest and Harrowfield, Jack and Kintzinger, Jean-Pierre and Lehn, Jean-Marie and Le Moigne, Jacques and Rissanen, Kari}, doi = {10.1002/cplu.201700557}, issn = {2192-6506}, year = {2018}, date = {2018-07-01}, journal = {CHEMPLUSCHEM}, volume = {83}, number = {7, SI}, pages = {605--611}, abstract = {The spherical macrotricyclic cryptand tetramine “C24” (1) displays remarkable protonation behaviour. It undergoes protonation in four successive steps for which pK(a) values of 11.17 +/- 0.05, 10.28 +/- 0.04, 6.00 +/- 0.06 and 3.08 +/- 0.08 have been determined at 298 K. The unusually close values for the first two protonations provide evidence for the encapsulation of a water molecule serving as effector for the second protonation, which is consistent with earlier observations that the exchange of protons bound in the diprotonated species with solvent protons is unusually slow and that O-17 NMR spectra show the presence of an oxygen centre in the same species quite distinct from that of solvent water. Encapsulation of water is also observed in the solid state in the picrate salt of the triprotonated form of 1 and has been characterised by means of X-ray structural determination.}, keywords = {}, pubstate = {published}, tppubtype = {article} } The spherical macrotricyclic cryptand tetramine “C24” (1) displays remarkable protonation behaviour. It undergoes protonation in four successive steps for which pK(a) values of 11.17 +/- 0.05, 10.28 +/- 0.04, 6.00 +/- 0.06 and 3.08 +/- 0.08 have been determined at 298 K. The unusually close values for the first two protonations provide evidence for the encapsulation of a water molecule serving as effector for the second protonation, which is consistent with earlier observations that the exchange of protons bound in the diprotonated species with solvent protons is unusually slow and that O-17 NMR spectra show the presence of an oxygen centre in the same species quite distinct from that of solvent water. Encapsulation of water is also observed in the solid state in the picrate salt of the triprotonated form of 1 and has been characterised by means of X-ray structural determination. |
Schuettpelz, Eric ; Rouhan, Germinal ; Pryer, Kathleen M; Rothfels, Carl J; Prado, Jefferson ; Sundue, Michael A; Windham, Michael D; Moran, Robbin C; Smith, Alan R Are there too many fern genera? Article de journal Dans: TAXON, 67 (3), p. 473–480, 2018, ISSN: 0040-0262. @article{schuettpelz_are_2018, title = {Are there too many fern genera?}, author = {Schuettpelz, Eric and Rouhan, Germinal and Pryer, Kathleen M. and Rothfels, Carl J. and Prado, Jefferson and Sundue, Michael A. and Windham, Michael D. and Moran, Robbin C. and Smith, Alan R.}, doi = {10.12705/673.1}, issn = {0040-0262}, year = {2018}, date = {2018-06-01}, journal = {TAXON}, volume = {67}, number = {3}, pages = {473--480}, keywords = {}, pubstate = {published}, tppubtype = {article} } |
Varma, Sreejith J; Muchowska, Kamila B; Chatelain, Paul ; Moran, Joseph Native iron reduces CO2 to intermediates and end-products of the acetyl-CoA pathway Article de journal Dans: NATURE ECOLOGY & EVOLUTION, 2 (6), p. 1019+, 2018, ISSN: 2397-334X. @article{varma_native_2018, title = {Native iron reduces CO2 to intermediates and end-products of the acetyl-CoA pathway}, author = {Varma, Sreejith J. and Muchowska, Kamila B. and Chatelain, Paul and Moran, Joseph}, doi = {10.1038/s41559-018-0542-2}, issn = {2397-334X}, year = {2018}, date = {2018-06-01}, journal = {NATURE ECOLOGY & EVOLUTION}, volume = {2}, number = {6}, pages = {1019+}, abstract = {Autotrophic theories for the origin of life propose that CO(2 )was the carbon source for primordial biosynthesis. Among the six known CO2 fixation pathways in nature, the acetyl-CoA (AcCoA; or Wood-Ljungdahl) pathway is the most ancient, and relies on transition metals for catalysis. Modern microbes that use the AcCoA pathway typically fix CO2 with electrons from H-2, which requires complex flavin-based electron bifurcation. This presents a paradox: how could primitive metabolic systems have fixed CO2 before the origin of proteins? Here, we show that native transition metals (Fe-0, Ni-0 and Co-0) selectively reduce CO2 to acetate and pyruvate-the intermediates and end-products of the AcCoA pathway-in near millimolar concentrations in water over hours to days using 1-40 bar CO2 and at temperatures from 30 to 100 degrees C. Geochemical CO2 fixation from native metals could have supplied critical C-2 and C-3 metabolites before the emergence of enzymes.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Autotrophic theories for the origin of life propose that CO(2 )was the carbon source for primordial biosynthesis. Among the six known CO2 fixation pathways in nature, the acetyl-CoA (AcCoA; or Wood-Ljungdahl) pathway is the most ancient, and relies on transition metals for catalysis. Modern microbes that use the AcCoA pathway typically fix CO2 with electrons from H-2, which requires complex flavin-based electron bifurcation. This presents a paradox: how could primitive metabolic systems have fixed CO2 before the origin of proteins? Here, we show that native transition metals (Fe-0, Ni-0 and Co-0) selectively reduce CO2 to acetate and pyruvate-the intermediates and end-products of the AcCoA pathway-in near millimolar concentrations in water over hours to days using 1-40 bar CO2 and at temperatures from 30 to 100 degrees C. Geochemical CO2 fixation from native metals could have supplied critical C-2 and C-3 metabolites before the emergence of enzymes. |
Travaglini, Leana ; De Cola, Luisa Morphology Control of Mesoporous Silica Particles Using Bile Acids as Cosurfactants Article de journal Dans: CHEMISTRY OF MATERIALS, 30 (12), p. 4168–4175, 2018, ISSN: 0897-4756. @article{travaglini_morphology_2018, title = {Morphology Control of Mesoporous Silica Particles Using Bile Acids as Cosurfactants}, author = {Travaglini, Leana and De Cola, Luisa}, doi = {10.1021/acs.chemmater.8b01873}, issn = {0897-4756}, year = {2018}, date = {2018-06-01}, journal = {CHEMISTRY OF MATERIALS}, volume = {30}, number = {12}, pages = {4168--4175}, abstract = {Morphology control and tuning of nanomaterials are crucial to determine their properties and applications. Solutions based on different synthetic methodologies have been proposed, and in general they required variation of several parameters. Here, a new facile and cost-effective bottom-up strategy to control the morphology of mesoporous silica particles is presented. Specifically, catanionic templating systems composed of bile acids and CTAB enable the production of submicrometer MCM-41 particles of various shapes, high porosity, and remarkable features. The variation of a single component, the bile acid, leads to the preparation of particles with different morphologies. For instance, small (textbackslashtextbackslashtextless500 nm) well-separated hexagonal platelets and twisted rods, with tunable aspect ratio and chiral pore channels, were prepared. Experiments aimed at elucidating the role of the bile acids showed that the control of shape is due to the specific interactions between bile acids and CTAB.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Morphology control and tuning of nanomaterials are crucial to determine their properties and applications. Solutions based on different synthetic methodologies have been proposed, and in general they required variation of several parameters. Here, a new facile and cost-effective bottom-up strategy to control the morphology of mesoporous silica particles is presented. Specifically, catanionic templating systems composed of bile acids and CTAB enable the production of submicrometer MCM-41 particles of various shapes, high porosity, and remarkable features. The variation of a single component, the bile acid, leads to the preparation of particles with different morphologies. For instance, small (textbackslashtextbackslashtextless500 nm) well-separated hexagonal platelets and twisted rods, with tunable aspect ratio and chiral pore channels, were prepared. Experiments aimed at elucidating the role of the bile acids showed that the control of shape is due to the specific interactions between bile acids and CTAB. |
Rizzi, Vito ; Fiorini, Federica ; Lamanna, Giuseppe ; Gubitosa, Jennifer ; Prasetyanto, Eko Adi ; Fini, Paola ; Fanelli, Fiorenza ; Nacci, Angelo ; De Cola, Luisa ; Cosma, Pinalysa Polyamidoamine-Based Hydrogel for Removal of Blue and Red Dyes from Wastewater Article de journal Dans: ADVANCED SUSTAINABLE SYSTEMS, 2 (6), 2018, ISSN: 2366-7486. @article{rizzi_polyamidoamine-based_2018, title = {Polyamidoamine-Based Hydrogel for Removal of Blue and Red Dyes from Wastewater}, author = {Rizzi, Vito and Fiorini, Federica and Lamanna, Giuseppe and Gubitosa, Jennifer and Prasetyanto, Eko Adi and Fini, Paola and Fanelli, Fiorenza and Nacci, Angelo and De Cola, Luisa and Cosma, Pinalysa}, doi = {10.1002/adsu.201700146}, issn = {2366-7486}, year = {2018}, date = {2018-06-01}, journal = {ADVANCED SUSTAINABLE SYSTEMS}, volume = {2}, number = {6}, abstract = {One of the major problems related to the use of dyes in industrial applications is their elimination from the water or soil and eventually their recovery and reutilization. In this context, a new biocompatible material, previously considered suitable for biomedical applications, is presented for the first time, as an innovative adsorbent material for wastewater treatment. A polyamidoamine-based hydrogel, prepared by Michael-type polyaddition in water, is used for efficiently adsorbing two anionic toxic textile dyes from aqueous solutions. Several parameters affecting the adsorption process, such as the pH of solutions containing dyes, the amount of hydrogel and dyes, and the effect of temperature, are investigated. Moreover, the hydrogel dehydration and swollen conditions by using dye water solution are studied by Thermo-Gravimetry (TG) and Differential Scanning Calorimetry (DSC) analyses, finding that the dehydration temperature plays a relevant role in determining the subsequent adsorbing behavior. The material characterization shows that the adsorption process can be attributed to a combination of electrostatic attraction and intermolecular interactions between hydrogel functional groups and the dye molecules. Visible absorption spectroscopy and Fourier Transform InfraRed-Attenuated Total Reflectance (FTIR-ATR) support the findings. The kinetics of the dye adsorption process are also evaluated, together with the adsorption isotherms.}, keywords = {}, pubstate = {published}, tppubtype = {article} } One of the major problems related to the use of dyes in industrial applications is their elimination from the water or soil and eventually their recovery and reutilization. In this context, a new biocompatible material, previously considered suitable for biomedical applications, is presented for the first time, as an innovative adsorbent material for wastewater treatment. A polyamidoamine-based hydrogel, prepared by Michael-type polyaddition in water, is used for efficiently adsorbing two anionic toxic textile dyes from aqueous solutions. Several parameters affecting the adsorption process, such as the pH of solutions containing dyes, the amount of hydrogel and dyes, and the effect of temperature, are investigated. Moreover, the hydrogel dehydration and swollen conditions by using dye water solution are studied by Thermo-Gravimetry (TG) and Differential Scanning Calorimetry (DSC) analyses, finding that the dehydration temperature plays a relevant role in determining the subsequent adsorbing behavior. The material characterization shows that the adsorption process can be attributed to a combination of electrostatic attraction and intermolecular interactions between hydrogel functional groups and the dye molecules. Visible absorption spectroscopy and Fourier Transform InfraRed-Attenuated Total Reflectance (FTIR-ATR) support the findings. The kinetics of the dye adsorption process are also evaluated, together with the adsorption isotherms. |
Yao, Yifan ; Zhang, Lei ; Leydecker, Tim ; Samori, Paolo Direct Photolithography on Molecular Crystals for High Performance Organic Optoelectronic Devices Article de journal Dans: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (22), p. 6984–6990, 2018, ISSN: 0002-7863. @article{yao_direct_2018, title = {Direct Photolithography on Molecular Crystals for High Performance Organic Optoelectronic Devices}, author = {Yao, Yifan and Zhang, Lei and Leydecker, Tim and Samori, Paolo}, doi = {10.1021/jacs.8b03526}, issn = {0002-7863}, year = {2018}, date = {2018-06-01}, journal = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, volume = {140}, number = {22}, pages = {6984--6990}, abstract = {Organic crystals are generated via the bottom up self-assembly of molecular building blocks which are held together through weak noncovalent interactions. Although they revealed extraordinary charge transport characteristics, their labile nature represents a major drawback toward their integration in optoelectronic devices when the use of sophisticated patterning techniques is required. Here we have devised a radically new method to enable the use of photolithography directly on molecular crystals, with a spatial resolution below 300 nm, thereby allowing the precise wiring up of multiple crystals on demand. Two archetypal organic crystals, i.e., p-type 2,7-diphenyl[1]benzothieno[3,2-b][1]benzothiophene (Dph-BTBT) nanoflakes and n-type N,N'-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) nanowires, have been exploited as active materials to realize high-performance top contact organic field-effect transistors (OFETs), inverter and p-n heterojunction photovoltaic devices supported on plastic substrate. The compatibility of our direct photolithography technique with organic molecular crystals is key for exploiting the full potential of organic electronics for sophisticated large-area devices and logic circuitries, thus paving the way toward novel applications in plastic (opto)electronics.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Organic crystals are generated via the bottom up self-assembly of molecular building blocks which are held together through weak noncovalent interactions. Although they revealed extraordinary charge transport characteristics, their labile nature represents a major drawback toward their integration in optoelectronic devices when the use of sophisticated patterning techniques is required. Here we have devised a radically new method to enable the use of photolithography directly on molecular crystals, with a spatial resolution below 300 nm, thereby allowing the precise wiring up of multiple crystals on demand. Two archetypal organic crystals, i.e., p-type 2,7-diphenyl[1]benzothieno[3,2-b][1]benzothiophene (Dph-BTBT) nanoflakes and n-type N,N'-dioctyl-3,4,9,10-perylenedicarboximide (PTCDI-C8) nanowires, have been exploited as active materials to realize high-performance top contact organic field-effect transistors (OFETs), inverter and p-n heterojunction photovoltaic devices supported on plastic substrate. The compatibility of our direct photolithography technique with organic molecular crystals is key for exploiting the full potential of organic electronics for sophisticated large-area devices and logic circuitries, thus paving the way toward novel applications in plastic (opto)electronics. |
Thomas, Anoop ; Chervy, Thibault ; Azzini, Stefano ; Li, Minghao ; George, Jino ; Genet, Cyriaque ; Ebbesen, Thomas W Mueller Polarimetry of Chiral Supramolecular Assembly Article de journal Dans: JOURNAL OF PHYSICAL CHEMISTRY C, 122 (25, SI), p. 14205–14212, 2018, ISSN: 1932-7447. @article{thomas_mueller_2018, title = {Mueller Polarimetry of Chiral Supramolecular Assembly}, author = {Thomas, Anoop and Chervy, Thibault and Azzini, Stefano and Li, Minghao and George, Jino and Genet, Cyriaque and Ebbesen, Thomas W.}, doi = {10.1021/acs.jpcc.8b01867}, issn = {1932-7447}, year = {2018}, date = {2018-06-01}, journal = {JOURNAL OF PHYSICAL CHEMISTRY C}, volume = {122}, number = {25, SI}, pages = {14205--14212}, abstract = {Supramolecular organizations of achiral molecules are known to undergo spontaneous mirror symmetry breaking, materializing chiral macroscopic structures with enantiomeric excess. Using Mueller polarimetry, we show that the hierarchy at play in the self-assembly of an achiral amphiphilic cyanine molecule, C8O3, can be encoded in a hierarchical evolution of the states of polarization of a light beam interacting with the self-assembly. We propose a methodology to monitor the formation, growth and bundling of supramolecular assemblies in solution by tracing, at each stage of assembly, the circular and linear dichroisms together with degree of depolarization. This systematic polarization monitoring of the self assembly allows us to investigate the various stages of the chiral nucleation process. In particular, we reveal that mirror symmetry breaking is driven, at the earliest stage of the self-assembly, by hydrophobic forces. Chiral excitons are then formed in tubular J-aggregates by a secondary nucleation, before an amplification of the chiral signal is observed in the final stage of assembly, corresponding to exciton coupling aided by the bundling of the tubular aggregates.}, keywords = {}, pubstate = {published}, tppubtype = {article} } Supramolecular organizations of achiral molecules are known to undergo spontaneous mirror symmetry breaking, materializing chiral macroscopic structures with enantiomeric excess. Using Mueller polarimetry, we show that the hierarchy at play in the self-assembly of an achiral amphiphilic cyanine molecule, C8O3, can be encoded in a hierarchical evolution of the states of polarization of a light beam interacting with the self-assembly. We propose a methodology to monitor the formation, growth and bundling of supramolecular assemblies in solution by tracing, at each stage of assembly, the circular and linear dichroisms together with degree of depolarization. This systematic polarization monitoring of the self assembly allows us to investigate the various stages of the chiral nucleation process. In particular, we reveal that mirror symmetry breaking is driven, at the earliest stage of the self-assembly, by hydrophobic forces. Chiral excitons are then formed in tubular J-aggregates by a secondary nucleation, before an amplification of the chiral signal is observed in the final stage of assembly, corresponding to exciton coupling aided by the bundling of the tubular aggregates. |
Herder, Martin ; Lehn, Jean-Marie The Photodynamic Covalent Bond: Sensitized Alkoxyamines as a Tool To Shift Reaction Networks Out-of-Equilibrium Using Light Energy Article de journal Dans: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (24), p. 7647–7657, 2018, ISSN: 0002-7863. @article{herder_photodynamic_2018, title = {The Photodynamic Covalent Bond: Sensitized Alkoxyamines as a Tool To Shift Reaction Networks Out-of-Equilibrium Using Light Energy}, author = {Herder, Martin and Lehn, Jean-Marie}, doi = {10.1021/jacs.8b03633}, issn = {0002-7863}, year = {2018}, date = {2018-06-01}, journal = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, volume = {140}, number = {24}, pages = {7647--7657}, abstract = {We implement sensitized alkoxyamines as “photodynamic covalent bonds”-bonds that, while being stable in the dark at ambient temperatures, upon photoexcitation efficiently dissociate and recombine to the bound state in a fast thermal reaction. This type of bond allows for the photochemically induced exchange of molecular building blocks and resulting constitutional variation within dynamic reaction networks. To this end, alkoxyamines are coupled to a xanthone unit as triplet sensitizer enabling their reversible photodissociation into two radical species. By studying the photochemical properties of three generations of sensitized alkoxyamines it became clear that the nature and efficiency of triplet energy transfer from the sensitizer to the alkoxyamine bond as well as the reversibility of photodissociation crucially depends on the structure of the nitroxide terminus. By employing the thus designed photodynamic covalent bonding motif, we demonstrate how to use light energy to shift a dynamic covalent reaction network away from its thermodynamic minimum into a photostationary state. The network could be repeatedly switched between its minimum and kinetically trapped out-of-equilibrium state by thermal scrambling and selective photoactivation of sensitized alkoxyamines, respectively.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We implement sensitized alkoxyamines as “photodynamic covalent bonds”-bonds that, while being stable in the dark at ambient temperatures, upon photoexcitation efficiently dissociate and recombine to the bound state in a fast thermal reaction. This type of bond allows for the photochemically induced exchange of molecular building blocks and resulting constitutional variation within dynamic reaction networks. To this end, alkoxyamines are coupled to a xanthone unit as triplet sensitizer enabling their reversible photodissociation into two radical species. By studying the photochemical properties of three generations of sensitized alkoxyamines it became clear that the nature and efficiency of triplet energy transfer from the sensitizer to the alkoxyamine bond as well as the reversibility of photodissociation crucially depends on the structure of the nitroxide terminus. By employing the thus designed photodynamic covalent bonding motif, we demonstrate how to use light energy to shift a dynamic covalent reaction network away from its thermodynamic minimum into a photostationary state. The network could be repeatedly switched between its minimum and kinetically trapped out-of-equilibrium state by thermal scrambling and selective photoactivation of sensitized alkoxyamines, respectively. |
Hagenmuller, David ; Schutz, Stefan ; Schachenmayer, Johannes ; Genes, Claudiu ; Pupillo, Guido Cavity-assisted mesoscopic transport of fermions: Coherent and dissipative dynamics Article de journal Dans: PHYSICAL REVIEW B, 97 (20), 2018, ISSN: 2469-9950. @article{hagenmuller_cavity-assisted_2018, title = {Cavity-assisted mesoscopic transport of fermions: Coherent and dissipative dynamics}, author = {Hagenmuller, David and Schutz, Stefan and Schachenmayer, Johannes and Genes, Claudiu and Pupillo, Guido}, doi = {10.1103/PhysRevB.97.205303}, issn = {2469-9950}, year = {2018}, date = {2018-05-01}, journal = {PHYSICAL REVIEW B}, volume = {97}, number = {20}, abstract = {We study the interplay between charge transport and light-matter interactions in a confined geometry by considering an open, mesoscopic chain of two-orbital systems resonantly coupled to a single bosonic mode close to its vacuum state. We introduce and benchmark different methods based on self-consistent solutions of nonequilibrium Green's functions and numerical simulations of the quantum master equation, and derive both analytical and numerical results. It is shown that in the dissipative regime where the cavity photon decay rate is the largest parameter, the light-matter coupling is responsible for a steady-state current enhancement scaling with the cooperativity parameter. We further identify different regimes of interest depending on the ratio between the cavity decay rate and the electronic bandwidth. Considering the situation where the lower band has a vanishing bandwidth, we show that for a high-finesse cavity, the properties of the resonant Bloch state in the upper band are transferred to the lower one, giving rise to a delocalized state along the chain. Conversely, in the dissipative regime with low-cavity quality factors, we find that the current enhancement is due to a collective decay of populations from the upper to the lower band.}, keywords = {}, pubstate = {published}, tppubtype = {article} } We study the interplay between charge transport and light-matter interactions in a confined geometry by considering an open, mesoscopic chain of two-orbital systems resonantly coupled to a single bosonic mode close to its vacuum state. We introduce and benchmark different methods based on self-consistent solutions of nonequilibrium Green's functions and numerical simulations of the quantum master equation, and derive both analytical and numerical results. It is shown that in the dissipative regime where the cavity photon decay rate is the largest parameter, the light-matter coupling is responsible for a steady-state current enhancement scaling with the cooperativity parameter. We further identify different regimes of interest depending on the ratio between the cavity decay rate and the electronic bandwidth. Considering the situation where the lower band has a vanishing bandwidth, we show that for a high-finesse cavity, the properties of the resonant Bloch state in the upper band are transferred to the lower one, giving rise to a delocalized state along the chain. Conversely, in the dissipative regime with low-cavity quality factors, we find that the current enhancement is due to a collective decay of populations from the upper to the lower band. |
Publications (FR)
2019 |
Interface Engineering in Organic Devices Article de journal Dans: Advanced Materials Technologies, 4 (1900303), 2019. |
Synthesis and breakdown of universal metabolic precursors promoted by iron Article de journal Dans: Nature, 569 , p. 104-107, 2019. |
Persian waxing of graphite: towards green large-scale production of graphene Article de journal Dans: Chem. Commun 2019, 55 , p. 5331-5334, 2019. |
Two-dimensional self-assembly and electrical properties of the donor-acceptor tetrathiafulvalene-polychlorotriphenylmethyl radical on graphite substrates Article de journal Dans: Journal of Applied Physics, 125 (142909), 2019. |
A Universal Approach toward Light-Responsive Two-Dimensional Electronics: Chemically Tailored Hybrid van der Waals Heterostructures Article de journal Dans: ACS Nano 2019, 13 (4), p. 4814-4825, 2019. |
Enhancement of the Electron−Phonon Scattering Induced by Intrinsic Surface Plasmon−Phonon Polaritons Article de journal Dans: ACS Photonics 2019, 6 (4), pp 1073–1081, 6 (4), p. 1073-1081, 2019. |
Nonvolatile Memories Based on Graphene and Related 2D Materials Article de journal Dans: Advanced Materials, 31 (Issue 10), p. 1806663, 2019. |
Thermally Limited Force Microscopy on Optically Trapped Single Metallic Nanoparticles Article de journal Dans: PHYSICAL REVIEW APPLIED , 11 ( 034023), 2019. |
Recreating ancient metabolic pathways before enzymes. Article de journal Dans: Bioorganic & Medicinal Chemistry, 2019. |
High‐Performance Graphene‐Based Cementitious Composites Article de journal Dans: ADVANCED SCIENCE, 6 (1801195), 2019. |
Optically switchable organic light-emitting transistors Article de journal Dans: Nature Nanotechnology, 14 , p. 347-353, 2019. |
Synthesis of new Mn19 analogues and their structural, electrochemical and catalytic properties Article de journal Dans: Dalton Transactions, (15), 2019. |
Tilting a ground-state reactivity landscape by vibrational strong coupling Article de journal Dans: Science, 363 (6427), p. 615-619, 2019. |
Nano-Subsidence-Assisted Precise Integration of Patterned Two-Dimensional Materials for High-Performance Photodetector Arrays Article de journal Dans: ACS Nano, 13 (2), p. 2654–2662, 2019. |
Novel Keplerate type polyoxometalate-surfactant-graphene hybrids as advanced electrode materials for supercapacitors Article de journal Dans: Energy Storage Materials, 17 (February 2019), p. p 186-193, 2019. |
Doping of Monolayer Transition-Metal Dichalcogenides via Physisorption of Aromatic Solvent Molecules Article de journal Dans: J. Phys. Chem. Lett, 10 (3), p. 540-547, 2019. |
Graphene Oxide Hybrid with Sulfur–Nitrogen Polymer for High-Performance Pseudocapacitors Article de journal Dans: J. Am. Chem. Soc., 141 (1), p. 482-487, 2019. |
Molecule–Graphene Hybrid Materials with Tunable Mechanoresponse: Highly Sensitive Pressure Sensors for Health Monitoring Article de journal Dans: Advanced Materials, 31(1), 1804600, 2019. |
2018 |
Electronic Decoupling in C3-Symmetrical Light-Responsive Tris(Azobenzene) Scaffolds: Self-Assembly and Multiphotochromism Article de journal Dans: J. Am. Chem. Soc., 2018, 140 (47), 16062–16070, 2018. |
Oscillations, travelling fronts and patterns in a supramolecular system Article de journal Dans: 2018, ISSN: 1748-3387, 1748-3395. |
Radioisotopic purity and imaging properties of cyclotron-produced Tc-99m using direct Mo-100(p,2n) reaction Article de journal Dans: PHYSICS IN MEDICINE AND BIOLOGY, 63 (18), 2018, ISSN: 0031-9155. |
Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics (vol 9, 3689, 2018) Article de journal Dans: NATURE COMMUNICATIONS, 9 , 2018, ISSN: 2041-1723. |
Molecular chemistry approaches for tuning the properties of two-dimensional transition metal dichalcogenides Article de journal Dans: CHEMICAL SOCIETY REVIEWS, 47 (17), p. 6845–6888, 2018, ISSN: 0306-0012. |
Current crowding issues on nanoscale planar organic transistors for spintronic applications Article de journal Dans: NANOTECHNOLOGY, 29 (36), 2018, ISSN: 0957-4484. |
Ring-opening hydroarylation of monosubstituted cyclopropanes enabled by hexafluoroisopropanol Article de journal Dans: CHEMICAL SCIENCE, 9 (30), p. 6411–6416, 2018, ISSN: 2041-6520. |
Concentration-dependent supramolecular patterns of C-3 and C-2 symmetric molecules at the solid/liquid interface Article de journal Dans: COLLOIDS AND SURFACES B-BIOINTERFACES, 168 , p. 211–216, 2018, ISSN: 0927-7765. |
Luminescence of Amphiphilic Pt-II Complexes Controlled by Confinement Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (46), p. 12054–12060, 2018, ISSN: 0947-6539. |
Phenoxyaluminum(salophen) Scaffolds: Synthesis, Electrochemical Properties, and Self-Assembly at Surfaces of Multifunctional Systems Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (46), p. 11954–11960, 2018, ISSN: 0947-6539. |
Structure of the EmrE multidrug transporter and its use for inhibitor peptide design Article de journal Dans: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 115 (34), p. E7932–E7941, 2018, ISSN: 0027-8424. |
Surface-Assisted Self-Assembly of a Hydrogel by Proton Diffusion Article de journal Dans: ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 57 (35), p. 11349–11353, 2018, ISSN: 1433-7851. |
Self-Assembled Two-Dimensional Supramolecular Networks Characterized by Scanning Tunneling Microscopy and Spectroscopy in Air and under Vacuum Article de journal Dans: LANGMUIR, 34 (26), p. 7698–7707, 2018, ISSN: 0743-7463. |
Spin State Chemistry: Modulation of Ligand pK(a) by Spin State Switching in a [2x2] Iron(II) Grid-Type Complex Article de journal Dans: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (26), p. 8218–8227, 2018, ISSN: 0002-7863. |
Total chemical synthesis and biophysical properties of a designed soluble 24 kDa amyloid analogue Article de journal Dans: CHEMICAL SCIENCE, 9 (25), p. 5594–5599, 2018, ISSN: 2041-6520. |
Chemical sensing with 2D materials Article de journal Dans: CHEMICAL SOCIETY REVIEWS, 47 (13), p. 4860–4908, 2018, ISSN: 0306-0012. |
Nanomaterials properties tuned by their environment: integrating supramolecular concepts into sensing devices Article de journal Dans: CHEMICAL SOCIETY REVIEWS, 47 (13), p. 4675–4676, 2018, ISSN: 0306-0012. |
Collective molecular switching in hybrid superlattices for light-modulated two-dimensional electronics Article de journal Dans: NATURE COMMUNICATIONS, 9 , 2018, ISSN: 2041-1723. |
Valid molecular dynamics simulations of human hemoglobin require a surprisingly large box size Article de journal Dans: ELIFE, 7 , 2018, ISSN: 2050-084X. |
Self-Suspended Nanomesh Scaffold for Ultrafast Flexible Photodetectors Based on Organic Semiconducting Crystals Article de journal Dans: ADVANCED MATERIALS, 30 (28), 2018, ISSN: 0935-9648. |
Unconventional Synthesis of a Cu-I Rotaxane with a Superacceptor Stopper: Ultrafast Excited-State Dynamics and Near-Infrared Luminescence Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (41), p. 10422–10433, 2018, ISSN: 0947-6539. |
Multivalent Metallosupramolecular Assemblies as Effective DNA Binding Agents Article de journal Dans: CHEMISTRY-A EUROPEAN JOURNAL, 24 (42), p. 10802–10811, 2018, ISSN: 0947-6539. |
Proton-Gradient-Driven Oriented Motion of Nanodiamonds Grafted to Graphene by Dynamic Covalent Bonds Article de journal Dans: ACS NANO, 12 (7), p. 7141–7147, 2018, ISSN: 1936-0851. |
Protonation of a Spherical Macrotricyclic Tetramine: Water Inclusion, Allosteric Effect, and Cooperativity Article de journal Dans: CHEMPLUSCHEM, 83 (7, SI), p. 605–611, 2018, ISSN: 2192-6506. |
Are there too many fern genera? Article de journal Dans: TAXON, 67 (3), p. 473–480, 2018, ISSN: 0040-0262. |
Native iron reduces CO2 to intermediates and end-products of the acetyl-CoA pathway Article de journal Dans: NATURE ECOLOGY & EVOLUTION, 2 (6), p. 1019+, 2018, ISSN: 2397-334X. |
Morphology Control of Mesoporous Silica Particles Using Bile Acids as Cosurfactants Article de journal Dans: CHEMISTRY OF MATERIALS, 30 (12), p. 4168–4175, 2018, ISSN: 0897-4756. |
Polyamidoamine-Based Hydrogel for Removal of Blue and Red Dyes from Wastewater Article de journal Dans: ADVANCED SUSTAINABLE SYSTEMS, 2 (6), 2018, ISSN: 2366-7486. |
Direct Photolithography on Molecular Crystals for High Performance Organic Optoelectronic Devices Article de journal Dans: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (22), p. 6984–6990, 2018, ISSN: 0002-7863. |
Mueller Polarimetry of Chiral Supramolecular Assembly Article de journal Dans: JOURNAL OF PHYSICAL CHEMISTRY C, 122 (25, SI), p. 14205–14212, 2018, ISSN: 1932-7447. |
The Photodynamic Covalent Bond: Sensitized Alkoxyamines as a Tool To Shift Reaction Networks Out-of-Equilibrium Using Light Energy Article de journal Dans: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 140 (24), p. 7647–7657, 2018, ISSN: 0002-7863. |
Cavity-assisted mesoscopic transport of fermions: Coherent and dissipative dynamics Article de journal Dans: PHYSICAL REVIEW B, 97 (20), 2018, ISSN: 2469-9950. |