AVS 47th International Symposium
    Processing at the Nanoscale/NANO 6 Wednesday Sessions
       Session NS+NANO6-WeP

Paper NS+NANO6-WeP11
Solution Deposition and Surface Characterization of Supported Gold Clusters

Wednesday, October 4, 2000, 11:00 am, Room Exhibit Hall C & D

Session: Poster Session
Presenter: C.C. Chusuei, Texas A&M University
Authors: C.C. Chusuei, Texas A&M University
X. Lai, Texas A&M University
K.A. Davis, Texas A&M University
P.S. Bagus, Texas A&M University
D.W. Goodman, Texas A&M University
M.A. Omary, Texas A&M University
M.A. Rawashdeh-Omary, Texas A&M University
Correspondent: Click to Email
Nanosized Au cluster agglomeration has been a long standing problem in the preparation of planar model catalyst systems. A novel Au/TiO@sub 2@ catalyst preparation method was investigated. Six-atom gold clusters (in the form of a Au@sub 6@(PPh@sub 3@)@sub 6@ colloidal suspension) was deposited onto a TiO@sub 2@(110) single crystal via CH@sub 2@Cl@sub 2@ solution. Scanning tunneling microscopy (STM) and spectroscopy (STS) revealed structures consistent with unagglomerated, single unit entities. Electron stimulated desorption (0.12 Coulombs/cm@sup 2@) was then performed. X-ray photoelectron spectroscopy, high resolution electron energy loss spectroscopy (HREELS) and STM showed evidence for removal of the triphenyl phosphine ligands. Band gap measurements from HREELS, STS and theoretical calculations suggest that metal/metal oxide support interactions affect the Au electronic structure.