AVS 46th International Symposium
    Applied Surface Science Division Tuesday Sessions
       Session AS-TuP

Paper AS-TuP20
Radiation Damage Study of n-Alkanethiols Deposited on Platinum

Tuesday, October 26, 1999, 5:30 pm, Room 4C

Session: Poster Session
Presenter: N. Franco, Lawrence Livermore National Laboratory
Authors: N. Franco, Lawrence Livermore National Laboratory
T. Van Buuren, Lawrence Livermore National Laboratory
C. Bostedt, Lawrence Livermore National Laboratory
L.J. Terminello, Lawrence Livermore National Laboratory
Correspondent: Click to Email
The potential technological applications of Self Assembled Monolayers (SAM's) has increased dramatically in the past few years. Most of these applications exploit the flexibility and simplicity of the monolayer film growth. Alkanethiols adsorbed on nobel metals are perhaps the best example of theses ordered interfaces and, in these cases, it has been shown that the stability of the adsorbed molecules is strongly related with the dimension of the carbon chain. We performed valence band and core level synchrotron radiation spectroscopy studies of different n-alkanethiols adsorbed on platinum in order to investigate the stability of these films under a Ultra Violet (UV) or soft X-ray exposure. Additionally we measured the change in the empty states by X-ray Absorption Spectroscopy (XAS) and we imaged the surface by Atomic Force Microscopy (AFM) to determine surface morphology. We will present results that suggest a change in the structure of the molecules adsorbed caused by irradiation. This change is related to the photon flux and is not energy dependent. @FootnoteText@ C. Bostedt is supported by the German Academic Exchange Service DAAD, N. Franco by the Spanish education and culture office. The work is supported by the US-DOE, OBES Material Sciences under contract W-7405-ENG-48, LLNL.