ESPCI web site
Jeudi 22 Janvier 2015, 14h
Amphi Holweck, Esc C, 1ème etage
Exploring the possibilities of graphene functionalization using the physi-, chimi-sorption of molecules and metal intercalation.
Laurent Simon (Mulhouse)
In the context where the research in graphene was essentially devoted to the synthesis of graphene on different substrates, we have explored different possibilities to functionalize graphene. By working essentially with epitaxial graphene on SiC(0001) substrates, three approaches have been studied :
The organization of self-assembled molecules with (1) the study of the molecule-graphene interaction, (2) the research of new strategies and molecular design to improve the reactivity of graphene in order to create chemical bonds with the possibility to control the reactive site, (3) the functionalization of graphene by the intercalation of metal atoms. We have combined the scanning probe microscopy techniques STM, STS and Fourier transform scanning tunneling spectroscopy, and more macroscopic electronic spectroscopic techniques such as the X- and UV-ray angular photoemission, using also synchrotron radiation (Cassiope ligne at Soleil). These studies have shown the possibility to modify the graphene band structure : the modification of the Fermi level position, the gap opening, an increase of the Fermi velocity and a modification of the band structure in the vicinity of the Van Hove singularities.
All these approaches could be combined for the realization of a graphene-based hybrid structure.
