Study of Molecular Reaction on Titanium Oxide by the Scanning Atom Probe

DOI Web Site 参考文献3件
  • Taniguchi Masahiro
    Division of Chemistry, College of Environmental Engineering and Architecture, Kanazawa Institute of Technology, Japan
  • Nishikawa Osamu
    Division of Chemistry, College of Environmental Engineering and Architecture, Kanazawa Institute of Technology, Japan
  • Komata Shigeto
    Division of Chemistry, College of Environmental Engineering and Architecture, Kanazawa Institute of Technology, Japan
  • Watanabe Shingo
    Division of Chemistry, College of Environmental Engineering and Architecture, Kanazawa Institute of Technology, Japan
  • Yamagishi Akihiko
    Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, Japan
  • Sasaki Takayoshi
    CREST, Japan Science and Technology Agency Nanoscale Materials Center, National Institute for Materials Science, Japan

抄録

In this study, we investigated the covalent materials by using a scanning atom probe (SAP) developed by Nishikawa, et al. SAP relaxes the severe requirement of the extremely sharp and slender shaping of sample for an analysis by conventional atom probe (AP). In the application of AP to non-metallic specimens with a low electron conductivity can be overcome by using pulsed laser beam for excitation. Discrete organic molecules and carbon nanotubes (CNT) were examined. CNTs gave mass spectra of few dominant fragments which reflected its one-dimensional homogeneous structure. Discrete molecules showed their molecular ion peaks in their AP mass spectra, which confirmed the softness of the field ionization process. The molecular ion peak disappeared when titania micro crystal was used as substrate in AP measurement. The change in the fragment pattern suggested the emergence of photocatalytic decomposition of adsorbed molecules on titania by laser irradiation. [DOI: 10.1380/ejssnt.2006.521]

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