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
Personal Author(s):
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.
Descriptors:
Subject Categories:
- Organic Chemistry
- Coatings, Colorants and Finishes
- Electricity and Magnetism
- Atomic and Molecular Physics and Spectroscopy