Accession Number:

ADA263359

Title:

AC Scanning Tunneling Spectroscopy of Self-Assembled Monolayers on Gold

Descriptive Note:

Technical rept. 1 Jun 1992-31 May 1993

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY

Report Date:

1992-03-30

Pagination or Media Count:

14.0

Abstract:

We demonstrate the spectroscopic capabilities of an AC scanning tunneling microscope. This AC scanning tunneling microscope has a bias voltage modulation frequency tunable over the range DC-20 GHz and is thus capable of recording images and local spectra of insulating as well as conducting substrates. In this paper we detail the spectral sensitivity and the tip-sample separation dependence of the spectra recorded by simultaneously tuning the modulation and detection frequencies. Spectra of an evaporated gold film and of self-assembled monolayers of CH3CH215SH and of CH302CCH215SH on gold are presented.

Subject Categories:

  • Organic Chemistry
  • Coatings, Colorants and Finishes
  • Electricity and Magnetism
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE