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

Shinichiro Imabayashi, Daisuke Hobara, Takashi Kakiuchi, Wolfgang Knoll

Research output: Contribution to journalArticle

148 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
Externally publishedYes

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3-Mercaptopropionic Acid
Self assembled monolayers
Desorption
desorption
acids
Gold
gold
Acids
mixing ratios
Substrates
Chain length
Phase separation

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

Selective replacement of adsorbed alkanethiols in phase-separated binary self-assembled monolayers by electrochemical partial desorption. / Imabayashi, Shinichiro; Hobara, Daisuke; Kakiuchi, Takashi; Knoll, Wolfgang.

In: Langmuir, Vol. 13, No. 17, 20.08.1997, p. 4502-4504.

Research output: Contribution to journalArticle

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