AVS 47th International Symposium
    Surface Science Wednesday Sessions
       Session SS2+VT-WeA

Paper SS2+VT-WeA8
Scanning Tunneling Microscopy and Spectroscopy of Metal Tetraphenylporphyrins on Au(111)

Wednesday, October 4, 2000, 4:20 pm, Room 209

Session: Adsorption and Desorption Phenomena I
Presenter: D.E. Barlow, Washington State University
Authors: K.W. Hipps, Washington State University
D.E. Barlow, Washington State University
L. Scudiero, Washington State University
Correspondent: Click to Email
STM images of metal(II) tetraphenylporphyrin monolayers on Au(111) are presented for several transition metal ions. The constant current images clearly reflect the electronic nature of the metal ion used. Scanning tunneling spectroscopy (dI/dV curves) also allows one to differentiate between the metal complexes. The primary electroactive states, as shown by tunneling spectroscopy, are those involving both occupied and unoccupied molecular orbitals close to the Fermi energy of the Au(111) substrate. Scanning tunneling spectroscopy results for the negative sample bias region are compared to Ultra-violet photoelectron spectra of these same compounds on Au.