AVS 46th International Symposium
    Nanometer-scale Science and Technology Division Tuesday Sessions
       Session NS2-TuM

Paper NS2-TuM2
Scanning Tunneling Microscopy of Conjugated Oligomers on Si(100)

Tuesday, October 26, 1999, 8:40 am, Room 6C

Session: Molecular Electronics
Presenter: B. Grandidier, IEMN CNRS, France
Authors: B. Grandidier, IEMN CNRS, France
J.P. Nys, IEMN CNRS, France
D. Stievenard, IEMN CNRS, France
C. Krzeminsky, IEMN CNRS, France
C. Delerue, IEMN CNRS, France
J.M. Raimundo, IMMO, Universite d'Angers, France
P. Frere, IMMO, Universite d'Angers, France
J. Roncali, IMMO, Universite d'Angers, France
Correspondent: Click to Email
Conjugated oligomers have attracted considerable interest as possible molecular wires. Investigation of the interaction of these molecules with the silicon (100) surface is therefore useful to gain insight into the way the oligomers could be connected to the silicon surface. The adsorption of different oligothiophenes on silicon (100) 2x1 have been studied by scanning tunneling microscopy in ultra high vacuum. The current constant images of the oligothiophenes are strongly bias dependent and allow the determination of the adsorption sites. The reaction involves the thiophene ring with a single Si atom of the Si=Si dimer. Ab initio calculations are performed to better characterize the chemical nature of the bonding.