Deposition and fabrication of alkanethiolate gold nanocluster films on TiO2(1 1 0) and the effects of plasma etching

Taketoshi Matsumoto, Patricia Nickut, Takeshi Sawada, Hironori Tsunoyama, Kazuya Watanabe, Tatsuya Tsukuda, Katharina Al-Shamery, Yoshiyasu Matsumoto

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Deposition and fabrication of films of Au nanoclusters protected by alkanethiolate ligands are attempted on a TiO2(1 1 0) surface and the structures of films are observed by a scanning tunneling microscope (STM). Effects of oxygen and hydrogen-plasma etching in addition to UV irradiation on the structure and chemical composition of the films are also investigated by using STM and X-ray photoelectron spectroscopy. Alkanethiolate Au nanoclusters are produced using a modified Brust synthesis method and their LB films are dip-coated on TiO2(1 1 0). Alkanethiolate Au nanoclusters are weakly bound to the substrate and can be manipulated with an STM tip. Net-like structures of alkanethiolate Au nanoclusters are formed by a strong blast of air. Oxygen-plasma etching removes alkanethiolate ligands and simultaneously oxidizes Au clusters. At room temperature, prolonged oxygen-plasma etching causes agglomeration of Au nanoclusters. UV irradiation removes ligands partly, which makes Au nanoclusters less mobile. The net-like structure of alkanethiolate Au clusters produced by a blast of air is retained after oxygen and hydrogen-plasma etching.

Original languageEnglish
Pages (from-to)5121-5126
Number of pages6
JournalSurface Science
Volume601
Issue number22
DOIs
Publication statusPublished - 2007 Nov 15
Externally publishedYes

Fingerprint

Plasma etching
Nanoclusters
plasma etching
nanoclusters
Gold
oxygen plasma
gold
Fabrication
fabrication
Oxygen
Microscopes
Ligands
microscopes
hydrogen plasma
blasts
Scanning
ligands
scanning
Hydrogen
Irradiation

Keywords

  • Etching
  • Gold
  • Langmuir/Blodgett/Kuhn assemblies
  • Nanopatterning
  • Nanostructures
  • Scanning tunnelling microscopy
  • Titanium oxide
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

Deposition and fabrication of alkanethiolate gold nanocluster films on TiO2(1 1 0) and the effects of plasma etching. / Matsumoto, Taketoshi; Nickut, Patricia; Sawada, Takeshi; Tsunoyama, Hironori; Watanabe, Kazuya; Tsukuda, Tatsuya; Al-Shamery, Katharina; Matsumoto, Yoshiyasu.

In: Surface Science, Vol. 601, No. 22, 15.11.2007, p. 5121-5126.

Research output: Contribution to journalArticle

Matsumoto, T, Nickut, P, Sawada, T, Tsunoyama, H, Watanabe, K, Tsukuda, T, Al-Shamery, K & Matsumoto, Y 2007, 'Deposition and fabrication of alkanethiolate gold nanocluster films on TiO2(1 1 0) and the effects of plasma etching', Surface Science, vol. 601, no. 22, pp. 5121-5126. https://doi.org/10.1016/j.susc.2007.04.157
Matsumoto, Taketoshi ; Nickut, Patricia ; Sawada, Takeshi ; Tsunoyama, Hironori ; Watanabe, Kazuya ; Tsukuda, Tatsuya ; Al-Shamery, Katharina ; Matsumoto, Yoshiyasu. / Deposition and fabrication of alkanethiolate gold nanocluster films on TiO2(1 1 0) and the effects of plasma etching. In: Surface Science. 2007 ; Vol. 601, No. 22. pp. 5121-5126.
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