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Accueil > Séminaires > Archive des séminaires d’Utinam > 2014

Frédéric Cherioux

From a Single Molecule to Multi-Component Self-Assemblies on a Silicon Surface

jeudi 19 juin 2014, 10h00

salle de conférences de l’observatoire

Frédéric Chérioux, Département Micro Nano Sciences & Systèmes (MN2S), FEMTO-ST

Résumé :

The formation and control of nano-objects adsorbed onto a surface are one of the most promising challenges in nanotechnology. In this context, molecular components have been successfully reported on noble metal surfaces. Nevertheless, the use of semiconducting interfaces remains important for the development of many devices, such as molecular electronics and materials for energy conversion. From an economic point of view, silicon-based surfaces are the best option, because their costs are much lower than the ones for metallic monocrystalline surfaces. Strong molecule–substrate interactions could be rarely avoided so far ; they can disrupt the growth of the supramolecular edifice but can also be helpful for nanostructuration by covalent grafting.

Here, I describe the basic rules for the adsorption of a single molecule on a silicon-based surface without covalent bond between molecule and the surface. Then, the growth of supramolecular networks will be investigated. Finally, by using this new strategy, a thermally-activated rotation of pentaphenylbenzene molecules within nanopores formed in a self-assembled supramolecular network on a silicon-based surface will be achieved. We think that this study opens new avenues for studying the controlled dynamics of molecular machines fabricated on semiconducting surfaces.

PNG - 385 ko
Molecular rotator adsorbed in open supramolecular framework on a silicon-based surface
PDF - 1.7 Mo
Version imprimable (PDF)


 
 
 
 
 

Post-scriptum :

Biography

Frédéric Chérioux obtained a PhD in Physical Chemistry in 1999 from and an habilitation degree in 2005 from University of Franche-Comté. He was a researcher at the Institute of Chemistry in Neuchâtel (Switzerland) from 2000 to 2003 in the Süss-Fink’s Group. Since 2003, he is CNRS researcher at the FEMTO-ST institute in Besançon. He is the Head of the Micro Nano Sciences & Systems (MN2S) research department of the FEMTO-ST Institute. His research is focused on the physics and chemistry of isolated molecules and supramolecular self-assembly on semiconductor or insulating surfaces.