Growth Mechanism Clarification and Control of Tungsten Oxide Nano Structures using Environmental TEM

• Project/Area Number: 22760537
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Structural/Functional materials
• Research Institution: Nagoya University
• Principal Investigator: TOKUNAGA Tomoharu 名古屋大学, 工学研究科, 助教 (90467332)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
• Keywords: 透過電子顕微鏡 / その場観察 / 結晶成長 / ナノロッド / タングステン / 電流測定 / タングステン酸化物 / 酸化物ナノロッド

Research Abstract

Growth mechanism of tungsten trioxide nanorod in tungsten oxide nano structures was studied by real time observation of tungsten oxide nanorod using environmental transmission elec tron microscopy (ETEM). It was cleared that existence of natural oxide layer was needed for growth of tungsten oxide nanorod. Farther, a lot of stacking fault was confirmed in nanorod. Electric property of nanorod was acquired from a nanorod grown in ETEM, and electric properties of bulk and nanorod were compared. Measurement results revealed that nanorod have not semiconductor property bulk have but conductor property.

Research Products

• [Journal Article] Growth and structure analysis of tungstenoxide nanorods using environmental TEM (2012)
  • Author(s): Tomoharu Tokunaga, Tadashi Kawamoto, Kenta Tanaka, Naohiro Nakamura, Yasuhiko Hayashi, Katsuhiro Sasaki, Kotaro Kuroda, Takahisa Yamamoto
  • Journal Title: Nanoscale Research Letters Volume: 7
  • Peer Reviewed
• [Journal Article] Growth and structure analysis of tungsten oxide nanorods using environmental TEM (2012)
  • Author(s): Tomoharu Tokunaga
  • Journal Title: Nanoscale Research Letters Volume: 7, 1
  • Peer Reviewed
• [Journal Article] Growth and structure analysis of tungsten oxide nanorods using environmental TEM (2012)
  • Author(s): T.Tokunaga
  • Journal Title: Nanoscale Research Letters Volume: 7 Issue: 1
  • DOI: 10.1186/1556-276x-7-85
  • Peer Reviewed
• [Journal Article] Growth and structure analysis of tungsten oxide nanorods using environmental TEM (2011)
  • Author(s): T. Tokunaga, T Kawamoto, K. Tanaka, N. Nakamura, Y. Hayashi, K. Sasaki, K. Kuroda
  • Journal Title: Proceedings of IEEE INEC 2011 Volume: 62
  • Peer Reviewed
• [Journal Article] Growth and structure analysis of tungsten oxide nanorods using environmental TEM (2011)
  • Author(s): T.Tokunaga
  • Journal Title: Proceedings of IEEE INEC 2011 Pages: 1-2
  • DOI: 10.1109/inec.2011.5991618
  • Peer Reviewed
• [Journal Article] TEM observation of structure and growth of the tungsten oxide nanorods (2010)
  • Author(s): T. Tokunaga, T. Kawamoto, K. Tanaka, Y. Hayashi, K. Sasaki, K. Kuroda
  • Journal Title: AMTC Letters Volume: 2 Pages: 80-81
  • Peer Reviewed
• [Presentation] タングステン酸化物ナノロッドの選択成長 (2012)
  • Author(s): 野田好孝
  • Organizer: 東海若手セラミスト懇話会
  • Place of Presentation: 静岡，ウェルシーズン浜名湖
• [Presentation] タングステン酸化物ナノロッドの成長制御 (2012)
  • Author(s): 野田好孝
  • Organizer: 日本金属学会
  • Place of Presentation: 日本金属学会 2012年 秋季講演大会
• [Presentation] タングステン酸化物ナノロッドの選択成長 (2011)
  • Author(s): 田中健太
  • Organizer: 日本金属学会2011年度秋期大会
  • Place of Presentation: 沖縄コンベンションセンター(沖縄県)
  • Year and Date: 2011-11-08
• [Presentation] タングステン酸化物ナノロッドの選択成長 (2011)
  • Author(s): 野田好孝
  • Organizer: 日本鉄鋼協会日本金属学会東海支部第21回材料フォーラム
  • Place of Presentation: 名古屋工業大学(愛知県)
  • Year and Date: 2011-11-01
• [Presentation] Growth and Structure Analysis of Tungsten Oxide Nanorods using Environmental Transmission Electron Microscopy (2011)
  • Author(s): Tomoharu Tokunaga, Tadashi Kawamoto, Kenta Tanaka, Naohiro Nakamura, Katsuhiro Sasaki, Kotaro Kuroda, Yasuhiko Hayashi
  • Organizer: IEEE INEC
  • Place of Presentation: Chang Gung University, Taiwan
  • Year and Date: 2011-06-24
• [Presentation] Tadashi Kawamoto, Kenta Tanaka, Naohiro Nakamura, Tomoharu Tokunaga, Katsuhiro Sasaki, Kotaro Kuroda (2010)
  • Author(s): The Investigation for Growth Mechanism of Tungsten Oxide Nanorods Using Environmental TEM
  • Organizer: The 4th International Workshop on Advanced Ceramics
  • Place of Presentation: Nagoya Institute of Technology, Nagoya, Japan
  • Year and Date: 2010-12-12
• [Presentation] タングステン酸化物ナノロッドの基板上成長制御 (2010)
  • Author(s): 田中健太
  • Organizer: 第20回学生による材料フォーラム
  • Place of Presentation: 名古屋大学
  • Year and Date: 2010-11-25
• [Presentation] Growth and Structure Analysis of Tungsten Oxide Nanorods using Environmental TEM (2010)
  • Author(s): Tomoharu Tokunaga
  • Organizer: 8th International Vacuum Electron Sources Conference and Nanocarbon
  • Place of Presentation: Southeast University, Nanjing, China
  • Year and Date: 2010-10-14
• [Presentation] W 酸化物ナノロッドの基板上成長制御 (2010)
  • Author(s): 田中健太,河本規,徳永智春,佐々木勝寛,黒田光太郎
  • Organizer: 日本金属学会 2010 年 秋季(第147回)大会
  • Place of Presentation: 北海道大学,札幌市
  • Year and Date: 2010-09-27
• [Presentation] タングステン酸化物ナノロッドの基板上成長制御 (2010)
  • Author(s): 田中健太
  • Organizer: 若手セラミスト懇話会
  • Place of Presentation: 岐阜県下呂市
• [Presentation] タングステン酸化物ナノロッドの基板上成長制御 (2010)
  • Author(s): 田中健太
  • Organizer: 日本金属学(147回)会秋季大会
  • Place of Presentation: 北海道大学