Alternating Current Scanning Tunneling Spectroscopy of Self-Assembled Monolayers on Gold

S. J. Stranick, P. S. Weiss’, A. N. Parikh

Research output: Contribution to journalArticle

19 Scopus citations

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 article 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 CH3(CH2)J5SH and of CH3O2C(CH2)j5SH on gold are presented.

Original languageEnglish (US)
Pages (from-to)739-741
Number of pages3
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume11
Issue number4
DOIs
StatePublished - 1993
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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