FUNDP homepage


Yves Caudano publications


FUNDP homepage

Laboratoire de Spectroscopie Moléculaire de Surface
Yves Caudano


Intra- and extramolecular vibrations of fulleride surfaces

C. Silien (1), P.A. Thiry (1), and Y. Caudano (1)
Phys. Rev. B, 67 (2003) 075412 (1-6)
Also published in the March 10, 2003 issue of the Virtual Journal of Nanoscale Science & Technology (


The surfaces of K-doped C60 thin films have been studied by high-resolution electron energy loss spectroscopy in reflection geometry. In addition to showing the expected intramolecular infrared-active modes of T1u symmetry, as well as their usual behavior upon doping, the K4C60 and K6C60 phases display two K-related, dipole-active, extramolecular phonons. In K3C60, the electronic screening limits the dipolar probing depth to the topmost layer and only one K-related phonon is observed. Our data also reveal that the Raman-active Ag vibrations dominate the intramolecular energy region. The properties and the modified K/C60 stoichiometry of the outmost surfaces of fullerides are discussed accordingly.

Author addresses

  1. Laboratoire de Spectroscopie Moléculaire de Surface (LASMOS)
    Institute for Studies in Interface Science (ISIS)
    Facultés Universitaires Notre-Dame de la Paix (FUNDP)
    61 Rue de Bruxelles, B-5000 Namur, Belgium

Go to : FUNDP / Faculty of Science / Physics Department / LASMOS laboratory / Yves Caudano / Publications

Email  Mailto : Webmaster

Last modified, July 10th 2003

Copyright © 1998 - 2003, Yves Caudano