Accession Number : ADA290278

Title :   Molecular Nanoclusters as Precursors to Conductive Thin Films and Crystals.

Descriptive Note : Technical rept. 1 May 94-30 Jun 95,

Corporate Author : MINNESOTA UNIV MINNEAPOLIS DEPT OF CHEMICAL ENGINEERING AND MATERIALS SCIENCE

Personal Author(s) : Hillier, Andrew C. ; Schott, Joachim H. ; Ward, Michael D.

PDF Url : ADA290278

Report Date : 20 JAN 1995

Pagination or Media Count : 17

Abstract : Research News: The fabrication of electrically conductive organic thin films and crystals is of both fundamental and technological interest. However, the mechanisms that control crystal structure and morphology during crystallization are not yet completely understood. In order to address these issues, we have employed scanning tunneling and atomic force microscopies to view the formation of molecular conductors on single crystal substrates. We have observed that these materials form ordered molecular nanoclusters, in which at least one dimension has molecular length scale. These nanoclusters evolve into thin films, and eventually, bulk crystals. The role of interactions between the substrate and organic overlayers, as well as the influence of intermolecular interactions within the molecular clusters, has been revealed. (jg)

Descriptors :   *CRYSTAL STRUCTURE, *CONDUCTIVITY, *MOLECULES, *THIN FILMS, *CLUSTERING, SCANNING, CONTROL SYSTEMS, PRECURSORS, SINGLE CRYSTALS, SUBSTRATES, CRYSTALLIZATION, CRYSTALS, NUCLEATION, ELECTRON MICROSCOPY, SCALE, ORGANIC MATERIALS, MOLECULE MOLECULE INTERACTIONS, TUNNELING, ATOMIC PROPERTIES, ELECTRIC CONDUCTORS.

Subject Categories : Organic Chemistry
      Physical Chemistry
      Crystallography
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE