Speaker
Wei Chuang Lee
(University of zurich)
Description
Remote control of molecular conformation is a challenge in nanotechnology. We realized this on gateable graphene on a SiO2/Si (MOS) structure, where the work function is changed reversibly.
The conformation of CeTi endohedral dimers in C80 evaporated on the graphene was measured with linear dichroism at the Ce_M4,5-edge. The change in orientation of the Ce-Ti ligand field axis is inferred from simulated XA spectra for different angles between the x-ray polarization and the Ce-Ti axis. Intriguingly, Ce displays mixed valency. The mechanism for change in conformation is attributed to the change in the density of states in graphene upon gating. This paves the way for magneto-electric applications of single molecules.
Author
Wei Chuang Lee
(University of zurich)
Co-authors
Dr
Ari Paavo Seitsonen
(Département de Chimie, École Normale Supérierue de Paris, Paris, France)
Bernard Delley
(Paul Scherrer Institut)
Mr
Lebin Yu
(University of Zurich)
Dr
Matthias Muntwiler
(Paul Scherrer Institute)
Dr
Shangfeng Yang
(University of Science and Technology of China)
Thomas Greber
Mr
Zhanxin Jiang
(University of Science and Technology of China)
