Langmuir-Blodgett Films of 3-Alkyl Pyrroles Studied by STM

Abstract

By applying the Langmuir-Blodgett (LB) technique mono- and multilayers of monomers and their polymers were built up on conductive solid substrates for studies with scanning tunneling microscopy (STM). Monomers, mixed monomers and polymer monolayers of 3-alkyl pyrroles were transferred onto freshly cleaved molybdenum disulfide (MoS2) and highly oriented pyrolytic graphite (HOPG). High-quality images of the mono- and multilayers could be observed by STM after annealing. Monolayers of monomer were highly ordered showing orientational and positional correlation of alkyl side chains. Mixtures of pyrroles with different side chain lengths showed phase separation. Polymer monolayers showed high side chain orientation more orthogonal to the surface. From the structures observed on solid substrates (gas-solid interface) conclusions are drawn for the polymerization process and the packing of molecules on the Langmuir-trough (at the gas interface).

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Dec 09, 1993
Accession Number
ADA274333

Entities

People

  • H. Sasabe
  • M. Hara
  • R. S. Duran
  • T. S. Bailey
  • W. M. Sigmund

Organizations

  • University of Florida

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Conductive Polymers
  • Films
  • Graphitic Materials
  • Langmuir Blodgett Films
  • Materials
  • Materials Science
  • Molecules
  • Monomolecular Films
  • Orientation (Direction)
  • Phase
  • Phase Separation
  • Phase Transformations
  • Polymeric Films
  • Polymers
  • Tunneling
  • Two Dimensional

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology
  • Thin Film Deposition Science.