Octadecyl mercaptan sub-monolayers on silver electrodeposited on gold quartz crystal microbalance electrodes

James D. Burgess, Fred M. Hawkridge

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

The objective of this work is to accurately and reproducibly control the amount of alkanethiol self-assembled onto the surface of a gold quartz crystal microbalance (QCM) electrode. This reaction is the first step in preparing bilayer membranes on gold electrodes that contain cytochrome c oxidase. In this work procedures for cleaning the surface of gold QCM electrodes, including use of an oxygen plasma, a UV surface cleaner, and aggressive chemical treatment of the surface, still led to rates of octadecyl mercaptan (OM) self-assembly that were highly irreproducible, varying over several orders of magnitude in time. Electrodeposition of a silver monolayer onto the surface of gold QCM electrodes affords a surface at which the OM self-assembly reaction can be easily controlled. Using the QCM to monitor the self-assembly reaction of OM on the silver-coated gold QCM electrode surface, a selected sub-monolayer coverage can be reliably prepared in about 10 min.

Original languageEnglish (US)
Pages (from-to)3781-3786
Number of pages6
JournalLangmuir
Volume13
Issue number14
DOIs
StatePublished - Jul 9 1997

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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