Unveiling polyoxometalate redox properties at the nanoscale
Polyoxometalates (POMs) are molecular nano-oxides of early transition metals. As molecular oxides, they are endowed with remarkable redox properties, combining the reducibility of bulk metal oxides and the high versatility of molecular species. They undergo successive, reversible, and highly adjusta...
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Académie des sciences
2024-11-01
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| Series: | Comptes Rendus. Chimie |
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| Online Access: | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.344/ |
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| author | Volatron, Florence Izzet, Guillaume Vuillaume, Dominique Proust, Anna |
| author_facet | Volatron, Florence Izzet, Guillaume Vuillaume, Dominique Proust, Anna |
| author_sort | Volatron, Florence |
| collection | DOAJ |
| description | Polyoxometalates (POMs) are molecular nano-oxides of early transition metals. As molecular oxides, they are endowed with remarkable redox properties, combining the reducibility of bulk metal oxides and the high versatility of molecular species. They undergo successive, reversible, and highly adjustable mono- (or multi-) electronic reduction processes within a narrow range of potentials. Furthermore, POMs are polyanions, with counter cations playing a crucial role, beyond ensuring charge neutrality. As the missing link between extended oxides, commonly found in microelectronics, and conventional organic or organometallic molecules, POMs have attracted ever-increasing interest in the field of nanoelectronics. They hold promise as charge storage nodes in multilevel nonvolatile memories and resistive switching devices, areas of interest currently boosted by the development of neuromorphic computing. In this context, we have been exploring various strategies to immobilize POMs onto electrodes with the aim of improving the control of the molecules/electrode interface. We have been investigating electron transport properties across POM-based molecular nanojunctions to establish relationships among the POM molecular structure, the electronic structure, and the properties of POM devices (e.g., conductance, switching). Additionally, we have demonstrated that we can commute the redox state of a POM layer by exposure to light or by applying an electric field, opening up new opportunities to stimuli-responsive devices. |
| format | Article |
| id | doaj-art-17046736b7da4e069a25bb43b832da8c |
| institution | Kabale University |
| issn | 1878-1543 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Chimie |
| spelling | doaj-art-17046736b7da4e069a25bb43b832da8c2025-02-07T13:39:46ZengAcadémie des sciencesComptes Rendus. Chimie1878-15432024-11-0127G125526810.5802/crchim.34410.5802/crchim.344Unveiling polyoxometalate redox properties at the nanoscaleVolatron, Florence0https://orcid.org/0000-0002-1009-0412Izzet, Guillaume1https://orcid.org/0000-0002-9849-4939Vuillaume, Dominique2https://orcid.org/0000-0002-3362-1669 Proust, Anna3https://orcid.org/0000-0002-0903-6507Institut Parisien de Chimie Moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, FranceInstitut Parisien de Chimie Moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, FranceInstitute for Electronics Microelectronics and Nanotechnology (IEMN), CNRS, University of Lille, Av. Poincaré, Villeneuve d’Ascq, FranceInstitut Parisien de Chimie Moléculaire (IPCM), CNRS, Sorbonne Université, 4 Place Jussieu, F-75005 Paris, FrancePolyoxometalates (POMs) are molecular nano-oxides of early transition metals. As molecular oxides, they are endowed with remarkable redox properties, combining the reducibility of bulk metal oxides and the high versatility of molecular species. They undergo successive, reversible, and highly adjustable mono- (or multi-) electronic reduction processes within a narrow range of potentials. Furthermore, POMs are polyanions, with counter cations playing a crucial role, beyond ensuring charge neutrality. As the missing link between extended oxides, commonly found in microelectronics, and conventional organic or organometallic molecules, POMs have attracted ever-increasing interest in the field of nanoelectronics. They hold promise as charge storage nodes in multilevel nonvolatile memories and resistive switching devices, areas of interest currently boosted by the development of neuromorphic computing. In this context, we have been exploring various strategies to immobilize POMs onto electrodes with the aim of improving the control of the molecules/electrode interface. We have been investigating electron transport properties across POM-based molecular nanojunctions to establish relationships among the POM molecular structure, the electronic structure, and the properties of POM devices (e.g., conductance, switching). Additionally, we have demonstrated that we can commute the redox state of a POM layer by exposure to light or by applying an electric field, opening up new opportunities to stimuli-responsive devices.https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.344/PolyoxometalatesMolecular oxidesRedox-active moleculesSurface functionalizationNanojunctionsElectron transportResistive switching devices |
| spellingShingle | Volatron, Florence Izzet, Guillaume Vuillaume, Dominique Proust, Anna Unveiling polyoxometalate redox properties at the nanoscale Comptes Rendus. Chimie Polyoxometalates Molecular oxides Redox-active molecules Surface functionalization Nanojunctions Electron transport Resistive switching devices |
| title | Unveiling polyoxometalate redox properties at the nanoscale |
| title_full | Unveiling polyoxometalate redox properties at the nanoscale |
| title_fullStr | Unveiling polyoxometalate redox properties at the nanoscale |
| title_full_unstemmed | Unveiling polyoxometalate redox properties at the nanoscale |
| title_short | Unveiling polyoxometalate redox properties at the nanoscale |
| title_sort | unveiling polyoxometalate redox properties at the nanoscale |
| topic | Polyoxometalates Molecular oxides Redox-active molecules Surface functionalization Nanojunctions Electron transport Resistive switching devices |
| url | https://comptes-rendus.academie-sciences.fr/chimie/articles/10.5802/crchim.344/ |
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