Selective replacement of adsorbed alkanethiols in phase-separated binary self-assembled monolayers by electrochemical partial desorption

Shin Ichiro Imabayashi, Daisuke Hobara, Takashi Kakiuchi, Wolfgang Knoll

Research output: Contribution to journalArticle

151 Citations (Scopus)

Abstract

A new method for preparing phase-separated binary self-assembled monolayers (SAMs) of alkanethiols on gold is proposed. Binary SAMs of 3-mercaptopropionic acid (MPA) and hexadecanethiol (HDT) at various mixing ratios which exhibit phase separation in nanometer scale are used as starting substrates. Because the MPA domains in the binary SAMs have a less negative desorption potential, they can be selectively removed by controlling the potential of gold substrates in 0.5 M KOH. Other alkanethiols with various chain lengths and terminal groups can subsequently be adsorbed where MPA was originally adsorbed, resulting in phase-separated binary SAMs with different combinations of alkanethiols.

Original languageEnglish
Pages (from-to)4502-4504
Number of pages3
JournalLangmuir
Volume13
Issue number17
Publication statusPublished - 1997 Aug 20

ASJC Scopus subject areas

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

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