Self-assembly and scanning tunneling microscopy tip-induced motion of ferrocene adamantane trithiolate adsorbed on Au(111)

Satoshi Katano, Yousoo Kim, Toshikazu Kitagawa, Maki Kawai

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We have studied the self-assembled monolayers (SAMs) of adamantane-based trithiolate, which consists of a ferrocene derivative at the head (ferrocene adamantane trithiolate; ferrocene-ATT), on Au(111) using low temperature scanning tunneling microscopy (STM). It was found that the adsorption behavior of ferrocene-ATT is similar to that of bromine adamantane trithiolate (BATT) adsorbed on Au(111). This indicates that adsorption of adamantane-based trithiol is controlled by three legs (CH2S) connected to bridgehead positions of the adamantane cage. Molecules, which form an ordered structure, are stable under low-bias-voltage scanning, i.e., a sample bias voltage lower than 1 V. STM tip-induced diffusion, however, was observed both for small clustered molecules and for molecules bound around the edge of an ordered molecular island. Furthermore, applying a high bias voltage (5 V) resulted in the destruction of SAMs structures.

Original languageEnglish
Pages (from-to)6156-6159
Number of pages4
JournalJapanese journal of applied physics
Volume47
Issue number7 PART 3
DOIs
Publication statusPublished - 2008 Jul 18

Keywords

  • Au(111)
  • Ferrocene
  • Molecular electronics
  • Molecular tripod
  • Scanning tunneling microscopy
  • Self-assembled monolayers
  • Thiol

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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