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タイトル
  • en In situ FT-IR study on the homogeneous nucleation of nanoparticles of titanium oxides from highly supersaturated vapor
作成者
    • en Ishizuka, Shinnosuke
    • en Yamazaki, Tomoya
アクセス権 open access
権利情報
  • en 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
  • http://creativecommons.org/licenses/by-nc-nd/4.0/
  • en Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
主題
  • Other en Nucleation
  • Other en Physical vapor deposition process
  • Other en Nanomaterials
  • Other en Oxides
  • NDC 420
内容注記
  • Abstract en The formation of nanoparticles of titanium oxides by homogeneous nucleation from highly supersaturated vapors was investigated by in situ Fourier transform IR spectroscopy and by observation of the resulting nanoparticles by transmission electron microscopy (TEM). Titanium metal was thermally evaporated in a specially designed chamber under a gaseous atmosphere of oxygen and argon. Nano particles nucleated and subsequently grew as they flew freely through the oxidizing gas atmosphere. Nascent nanoparticles of titanium oxides showed a broad IR absorption band at 10-20 mu m. Subsequently, the cooled nanoparticles showed a sharp crystalline anatase feature at 12.8 mu m. TEM observations showed the formation of spherical anatase nanoparticles. The IR spectral evolution showed that the titanium oxides nucleated as metastable liquid droplets, and that crystallization proceeded through secondary nucleation from the supercooled liquid droplets. This suggests that history of the titanium oxide nanoparticles, such as the temperature and oxidation that they experience after nucleation, determines their polymorphic form. (C) 2016 Elsevier B.V. All rights reserved.
出版者 en Elsevier
日付
    Issued2016-09-15
言語
  • eng
資源タイプ journal article
出版タイプ AM
資源識別子 HDL http://hdl.handle.net/2115/71530
関連
  • isVersionOf DOI https://doi.org/10.1016/j.jcrysgro.2016.06.036
収録誌情報
    • PISSN 0022-0248
      • en Journal of crystal growth
      • 450 開始ページ168 終了ページ173
ファイル
コンテンツ更新日時 2023-10-07