Chargé de Recherche CNRS
+33 (0)3 20 19 79 35
Stéphane Lenfant, CR1-HDR CNRS researcher has more than fifteen years of expertise in the field of organic and molecular electronics. He has also a large experience in nanostructures fabrication (e-beam and UV lithography, etching…), physical characterizations (AFM, XPS-UPS, spectroscopy UV-vis and FTIR) and electrical characterizations at the macro-scale (I-V 4K to 300K, C-V…) and at nano-scale by scanning probe microscopes (STM, C-AFM, EFM, KPFM…).
Stéphane Lenfant contributes in the NCM group at IEMN-CNRS, to the integration and the electrical characterization of molecular junctions with self-assembled monolayers grafted on gold or silicon surfaces. He coordinated the SYNAPTOR project (ANR 2014-2016) that has explored the integration of optical and switchable molecules for neuromorphic computing. He has participated to several national and European projects (currently HARVESTER ANR 2017-2021 and SPINFUN ANR 2018-2020). In addition to his scientific contribution in different WPs, he will manage the project (report writing, meetings organization…).
He has also been an active expert in the OMNT network dedicated to molecular electronics (2017). His current research on light switchable molecules (with azobenzene or diarylethene) includes material investigation (chemical/ physical properties) to grafting, integration, and characterization of the related devices (from macroscopic surface contact to the nanoscale).
Current research interests
- Scanning probe microscope in electric mode (Conducting-AFM, KPFM, EFM)
- Integration and electrical characterization of self-assembled monolayers
- Functionalizationand surface characterizations
- Electronic properties of light switchable molecules deposited in self-assembled monolayers
Current project activities
- Spintronics with functional molecules (SPINFUN)
- Harvesting energy with polymer based thermoelectric generator to power autonomous sensors (HARVESTERS)
ANR, 2017-2021. https://anr.fr/Project-ANR-16-CE05-0029
Five selected publications
- Conductance switching at the nanoscale of diarylethene derivatives self-assembled monolayers on La0.7Sr0.3MnO3
THOMAS L., GUERIN D., QUINARD B., JACQUET E., MATTANA R., SENEOR P., VUILLAUME D., MELIN T., LENFANT S.
Nanoscale (2020) (in press)
doi: 10.1039/C9NR09928J (arXiv)
- Physical mechanisms involved in the formation and operation of memory devices based on a monolayer of gold nanoparticle-polythiophene hybrid materials
ZHANG T.C., GUERIN D., ALIBART F., TROADEC D., HOURLIER D., PATRIARCHE G., YASSIN A., OÇAFRAIN M., BLANCHARD P., RONCALI J., VUILLAUME D., LMIMOUNI K., LENFANT S.
Nanoscale Adv. 1, 7 (2019) 2718-2726
doi: 10.1039/C9NA00285E (arXiv) (hal-02182920)
- Negative Differential Resistance, Memory and Reconfigurable Logic Functions based on Monolayer Devices derived from Gold Nanoparticles functionalized with Electropolymerizable Thiophene-EDOT units
T. ZHANG, D. GUÉRIN, F. ALIBART, D. VUILLAUME, K. LMIMOUNI, S. LENFANT, A. YASSIN, M. OÇAFRAIN, P. BLANCHARD, J. RONCALI
J. Phys. Chem. C, 2017, 121 (18), pp 10131–10139
doi: 10.1021/acs.jpcc.7b00056 [arXiv]
- Physical Study by Surface Characterizations of Sarin Sensor on the Basis of Chemically Functionalized Silicon Nanoribbon Field Effect Transistor
K. SMAALI, D. GUERIN, V. PASSI, L. ORDRONNEAU, A. CARELLA, T. MELIN, E. DUBOIS, D. VUILLAUME, J.P. SIMONATO, S. LENFANT
J. Phys. Chem. C 2016, 120, 20, 11180-11191.
Doi: 10.1021/acs.jpcc.6b00336 [arXiv]
- High Conductance Ratio in Molecular Optical Switching of Functionalized Nanoparticle Self-Assembled Nanodevices
Y. VIERO, G. COPIE, D. GUÉRIN, C. KRZEMINSKI, D. VUILLAUME, S. LENFANT, F. CLERI
J. Phys. Chem. C 2015, 119, 36, 21173-21183
Doi: 10.1021/acs.jpcc.5b05839 [arXiv]