Accession Number:

ADA276072

Title:

A New Mechanism for Surface Diffusion: Motion of a Substrate-Adsorbate Complex

Descriptive Note:

Technical rept.

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY

Personal Author(s):

• Stranick, S. J.
• Parikh, A. N.
• Allara, D. L.
• Weiss, P. S.

Report Date:

1993-12-08

Pagination or Media Count:

18.0

Abstract:

We propose a new mechanism for diffusion of surface adsorbates in which motion of the substrate atoms to which the adsorbates are attached results in the motion of the substrate-adsorbate complex. We show an experimental example - the motion of self-assembled monolayers SAMs of CH302CCH215SH on gold which we have observed by recording time-lapse movies with scanning tunneling microscopy.

Descriptors:

• *MOTION
• *SUBSTRATES
• *SURFACES
• *DIFFUSION
• *ADSORBATES
• SCANNING
• ATOMS
• TUNNELING
• THIOLS
• ETHANOLS
• GOLD
• CHEMICAL REACTIONS
• TIME
• MICROSCOPY
• MOLECULES
• FILMS

Subject Categories:

• Physical Chemistry
• Laminates and Composite Materials
• Atomic and Molecular Physics and Spectroscopy
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE