AVS 52nd International Symposium
    Surface Science Tuesday Sessions
       Session SS1-TuM

Paper SS1-TuM11
STS Vibrational Study of 1,3-cyclohexadiene on Si(100) Surface

Tuesday, November 1, 2005, 11:40 am, Room 202

Session: Vibrational Spectroscopy of Surfaces
Presenter: B. Naydenov, Trinity College Dublin, Ireland
Authors: B. Naydenov, Trinity College Dublin, Ireland
J.J. Boland, Trinity College Dublin, Ireland
Correspondent: Click to Email
Scanning tunnelling spectroscopy was performed on 1,3-cyclohexadiene modified Si(100) surface at 5K. Degenerated N-type semiconductor and platinum covered tungsten tips were used. For the first time a vibrational spectrum of chemisorbed molecule on semiconductor surface was obtained. The spectroscopic conditions involved small tip-sample separations, far from the normal imaging conditions, and for wish the simple tunnelling picture involving overlapping wave function tails is no longer valid. Under such conditions significant forces and weak chemical bond occurs between the tip and the surface. The vibrational features and the tunnelling barrier height variations with the tip-sample distance will be discussed.