Scanning Tunneling Microscopy Studies of Self-Assembled Monolayers of Alkanethiols on Gold

Abstract

We have used scanning tunneling microscopy to probe the molecular scale structures of pure and mixed composition self-assembled monolayers of CH3(CH2)15SH and CH302C(CH2)15SH on gold. A predominant defect structure is found for both films and is assigned as a void defect in the thiolate overlayer. The mixed composition films are observed to phase segregate into domains of the pure component thiolates. Time-lapse series of scanning tunneling microscope images reveal kink-driven motion at step edges and exchange of thiolate molecules on terraces.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 05, 1994
Accession Number
ADA279910

Entities

People

  • A. N. Parikh
  • D. L. Allara
  • K. R. Krom
  • M. M. Kamna
  • S. J. Stranick

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Energy
  • Films
  • Infrared Spectroscopy
  • Materials
  • Materials Science
  • Microscopy
  • Military Research
  • Molecules
  • Monomolecular Films
  • Nanotechnology
  • Phase
  • Quantum Tunneling
  • Self Assembled Monolayers
  • Spectroscopy
  • Tunneling
  • X Ray Photoelectron Spectroscopy

Fields of Study

  • Physics

Readers

  • Electrochemical Surface Science
  • Materials Science and Engineering.