Accession Number : ADA298317

Title :   Substrate Effects on the Nanometer-Scale Mechanics of Gold Films.

Descriptive Note : Technical rept. 1 Jun 94-31 May 95,

Corporate Author : TEXAS A AND M UNIV COLLEGE STATION DEPT OF CHEMISTRY

Personal Author(s) : Tangyunyong, P. ; Thomas, R. C. ; Houston, J. E. ; Michalske, T. A. ; Crooks, R. M.

PDF Url : ADA298317

Report Date : 18 AUG 1995

Pagination or Media Count : 36

Abstract : We have used interfacial force microscopy (IFM) and contact-mechanics analysis to quantitatively determine the deformation behavior and the mechanical properties of nanometer-size grains in polycrystalline Au films on various substrates. We evaluate these properties through an analysis of the loading-cycle curves and through a comparison of surface morphology before and after each nano-indention measurement by constant repulsive-force imaging. All the Au surfaces were coated with self-assembling monolayers of n-octadecanethiol to passivate the adhesive interaction between the tungsten probe and Au surfaces. Our results show that both the deformation behavior and mechanical properties vary strongly as a function of substrate and these variations are mirrored by changes in such factors as the interfacial adhesion, grain size and shape, and the presence of grain-boundary impurities. jg p.1

Descriptors :   *MECHANICAL PROPERTIES, *FILMS, *SUBSTRATES, *GOLD, PROBES, INTERACTIONS, INTERFACES, DEFORMATION, ADHESION, MORPHOLOGY, GRAIN SIZE, IMPURITIES, MICROSCOPY, SURFACE PROPERTIES, TUNGSTEN, ADHESIVES, GRAIN BOUNDARIES, POLYCRYSTALLINE.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Laminates and Composite Materials
      Crystallography

Distribution Statement : APPROVED FOR PUBLIC RELEASE