低次元酸化物ナノ材料の高次構造と機能の融合

• Project Area: Fusion Materials: Creative Development of Materials and Exploration of Their Function through Molecular Control
• Project/Area Number: 25107704
• Research Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
• Allocation Type: Single-year Grants
• Review Section: Science and Engineering
• Research Institution: Osaka University (2014); Tohoku University (2013)
• Principal Investigator: 関野 徹 大阪大学, 産業科学研究所, 教授 (20226658)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000); Fiscal Year 2014: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2013: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: ナノ材料 / 自己組織化 / 表面界面物性 / 低次元ナノ構造 / 吸着 / 光触媒 / 構造機能融合 / 生体適合性 / 表面・界面物性 / 生体材料 / 融合マテリアル / 高次機能

Outline of Annual Research Achievements

高次に構造設計および制御された低次元酸化物ナノ構造体を、自己組織化的に多様な基材表面へ直接形成させ、低次元ナノ構造と材料物性とを共生させることで優れた環境調和機能や生体適合性などの多機能を獲得した構造-機能融合マテリアルの創出とその機能応用を目的とした研究を実施し、以下の知見を得た。
金属Tiおよび合金を化学処理することで表面に得たポーラスナノネットワーク構造では、ナノシート構造表面のリン酸およびカルシウムイオン吸着量は低い一方、比較的高い温度で処理し、ナノチューブ（TNT）を主構造とした表面で高い事を見いだし、リン酸カルシウムなどの易析出性など生体適合性表面を構築する指針を得た。
紫外線照射中のラジカル発生量を電子スピン共鳴（ESR）により測定した結果、照射単位面積当たりの活性酸素ラジカル生成量は通常の光触媒であるチタニアナノ粒子に比較して大きく、熱処理で更に向上させることに成功した。
特異な低次元ナノ構造-物理光化学機能共生に基づく融合マテリアルの創成へ向け、多層CNTをコアとしTNTをシェルとした1次元コアシェル型ナノコンポジット創成に初めて成功した。このナノコンポジットではメチレンブルー（MB）有機色素吸着特性に優れると共に、紫外光照射では優れた光触媒分解特性を示すなど、低次元異方ナノ複合構造の優位性を実証した。
チタニアナノチューブの格子構造レベルでの制御を元素固溶法により行い、固溶型TNTでは純粋なTNT同様に高いMB色素吸着特性を示し、特に2種類の元素固溶TNTではより著しいMB吸着特性を認めた。更に可視光照射条件下でも高い光触媒特性を示し、化学組成および特有な層状化合物状の結晶構造などに由来した効果と考察し、格子レベル融合により極めて優れた環境機能が融合したナノマテリアル創成に成功した。

Research Progress Status

26年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

26年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Effect of Porphyromonas gingivalis lipopolysaccharide on bone marrow mesenchymal stem cell osteogenesis on a titanium nanosurface (2015)
  • Author(s): H. Xing, Y. Taguchi, S. Komasa, I. Yamawaki, T. Sekino, M. Umeda, and J. Okazaki
  • Journal Title: Journal of Periodontology Volume: 86 Issue: 3 Pages: 448-455
  • DOI: 10.1902/jop.2014.140386
  • Peer Reviewed / Open Access
• [Journal Article] Application of Titanium Dioxide Nanotubes to Tooth Whitening (2014)
  • Author(s): Obito Komatsu, Hisataka Nishida, Tohru Sekino, and Kazuyo Yamamoto
  • Journal Title: Nano Biomedicine Volume: 6 Pages: 63-72
  • NAID: 130005130559
  • Peer Reviewed
• [Journal Article] 化学反応場制御による低次元ナノ構造チタニアの創製と高次機能 (2014)
  • Author(s): 関野 徹，田中俊一郎
  • Journal Title: まてりあ Volume: 53 Pages: 546-549
  • NAID: 130004709922
  • Peer Reviewed
• [Journal Article] EDTA mediated microwave hydrothermal synthesis of WO3 hierarchical structure and its photoactivity under simulated solar light (2014)
  • Author(s): R. Adhikari, G. Gyawali, T.H. Kim, T. Sekino, S.W. Lee
  • Journal Title: Journal of Environmental Chemical Engineering Volume: 2 Issue: 3 Pages: 1365-1370
  • DOI: 10.1016/j.jece.2014.02.019
  • Peer Reviewed
• [Journal Article] Understanding the infrared to visible upconversion luminescence properties of Er3+/Yb3+ co-doped BaMoO4 nanocrystals, (2014)
  • Author(s): R. Adhikari, J. Choi, R. Narro-Garcia, E. De La Rosa, T. Sekino, S.W. Lee
  • Journal Title: Journal of Solid State Chemistry Volume: 216 Pages: 36-41
  • DOI: 10.1016/j.jssc.2014.04.013
  • Peer Reviewed
• [Journal Article] Effect of Nanosheet Surface Structure of Titanium Alloys on Cell Differentiation (2014)
  • Author(s): Satoshi Komasa, Tetsuji Kusumoto, Yoichiro Taguchi, Hiroshi Nishizaki, Tohru Sekino, Makoto Umeda, Joji Okazaki, and Takayoshi Kawazoe
  • Journal Title: Journal of Nanomaterials Volume: 2014 Issue: 1
  • DOI: 10.1155/2014/642527
  • Peer Reviewed / Open Access
• [Journal Article] Osteogenic activity of titanium surfaces with nanonetwork structures (2014)
  • Author(s): H. Xing, S. Komasa, Y. Taguchi, T. Sekino, and J. Okazaki
  • Journal Title: Int. J. Nanomed. Volume: 9 Pages: 1741-1755
  • DOI: 10.2147/ijn.s58502
  • Peer Reviewed
• [Journal Article] Cell Differentiation on Nanoscale Features of a Titanium Surface: Effects of Deposition Time in NaOH Solution (2014)
  • Author(s): T. Fujino, Y. Taguchi, S. Komasa, T. Sekino, M. Tanaka
  • Journal Title: Journal of Hard Tissue Biology Volume: 23 Issue: 1 Pages: 63-70
  • DOI: 10.2485/jhtb.23.63
  • NAID: 130004480639
  • ISSN: 1341-7649, 1880-828X
  • Peer Reviewed
• [Journal Article] Synthesis of Sm-doped TiO2 Nanotube and Analysis of Its Methylene Blue Removal Properties under Dark and UV Irradiated Conditions (2013)
  • Author(s): D. J. Park, T. Sekino, S. Tsukuda, and S.-I. Tanaka
  • Journal Title: Res. Chem. Intermed. Volume: 39 Issue: 4 Pages: 1581-1591
  • DOI: 10.1007/s11164-012-0614-x
  • Peer Reviewed
• [Presentation] Structure Tuning of Titania Nanotubes for Physical-photochemical Multi-functionalization (2015)
  • Author(s): T. Sekino
  • Organizer: TMS2015 144th Annual Meeting & Exhibition
  • Place of Presentation: Orlando, FL (USA)
  • Year and Date: 2015-03-15 – 2015-03-19
  • Invited
• [Presentation] Materials Tuning of Titania Nanotubes and their Energy Applications (2015)
  • Author(s): T. Sekino
  • Organizer: Materials Challenges in Alternative & Renewable Energy (MCARE 2015)
  • Place of Presentation: Jeju (Korea)
  • Year and Date: 2015-02-24 – 2015-02-27
  • Invited
• [Presentation] Structure Tuning of Titania Nanotubes for Solar Energy Conversion (2014)
  • Author(s): T. Sekino
  • Organizer: International Conference on Sustainable Energy Technology
  • Place of Presentation: Coimbatore (India)
  • Year and Date: 2014-12-11 – 2014-12-13
  • Invited
• [Presentation] Modification of Titania Nanotubes by Metal-doping and their Physico- and Photo-chemical Functions (2014)
  • Author(s): Hisataka Nishida, Hiroaki Sugiyama, Shun-Ichiro Tanaka, and Tohru Sekino
  • Organizer: The 18th SANKEN International Symposium
  • Place of Presentation: 大阪大学（大阪府茨木市）
  • Year and Date: 2014-12-10 – 2014-12-11
• [Presentation] Nanoscale Hybridization of Oxide Nanotubes for Multi-functionalization (2014)
  • Author(s): T. Sekino
  • Organizer: The 3rd International Symposium on Hybrid Materials and Processing
  • Place of Presentation: Busan (Korea)
  • Year and Date: 2014-11-10 – 2014-11-13
  • Invited
• [Presentation] Photophysical-chemial Multifunctionalization of Low-dimensional Oxides Nanostructures via Advanced Fusional Structure Control (2014)
  • Author(s): T. Sekino, H. Nishida, and K. Kuremoto
  • Organizer: The 2nd International Symposium on Fusion Materials
  • Place of Presentation: 東京大学（東京都文京区）
  • Year and Date: 2014-11-02 – 2014-11-04
• [Presentation] Modofication of Titania Nanotubes by Ru-doping and Their Optical and Physico-chemical Properties (2014)
  • Author(s): H. Sugiyama, and T. Sekino
  • Organizer: The 3rd International Conference on Competitive Materials and Technology Processes (IC-CMTP3)
  • Place of Presentation: Miskolc (Hungary)
  • Year and Date: 2014-10-06 – 2014-10-11
• [Presentation] Direct Formation of Porous Nano-architectures on Ti-based Metal Surfaces by Solution Chemical Processing and Their Biocompatible Functions (2014)
  • Author(s): Tohru Sekino, Koki Kaga, Hisataka Nishida, Koh-Ichi Kuremoto, and Shun-Ichiro Tanaka
  • Organizer: The 15th IUMRS-International Conference in Asia (IUMRS-ICA 2014)
  • Place of Presentation: 福岡大学（福岡県福岡市）
  • Year and Date: 2014-08-24 – 2014-08-30
  • Invited
• [Presentation] Materials Tuning of Titania Nanotubes and their Physico-photochemical Multifunctions (2014)
  • Author(s): T. Sekino
  • Organizer: The 5th International Congress on Ceramics (ICC5)
  • Place of Presentation: Beijing (China)
  • Year and Date: 2014-08-17 – 2014-08-21
  • Invited
• [Presentation] Materials Tuning of Titania Nanotubes for Physicochemical and Photochemical Multifunctionalization (2014)
  • Author(s): Tohru Sekino, Hiroki Tsukamoto, Hiroaki Sugiyama, Tae-Ho Kim, Soo Wohn Lee, and Shun-Ichiro Tanaka
  • Organizer: The 6th International Symposium on Functional Materials (ISFM2014)
  • Place of Presentation: Singapore (Singapore)
  • Year and Date: 2014-08-04 – 2014-08-07
  • Invited
• [Presentation] Development of Multifunctional Titania Nanotubes for Energy and Environmental Applications (2014)
  • Author(s): T. Sekino
  • Organizer: Energy Material Nanotechnology (EMN) Summer Meeting 2014
  • Place of Presentation: Cancun (Mexico)
  • Year and Date: 2014-06-09 – 2014-06-12
  • Invited
• [Presentation] Low-dimensional oxide nanomaterials - Design, structure and multifunctions for sustainable eco-society (2014)
  • Author(s): Tohru Sekino
  • Organizer: The 15th International Symposium on Eco-materials Processing and Design (ISEPD2014)
  • Place of Presentation: Hanoi, Vietnam
  • Invited
• [Presentation] Structure tuning of titania nanotubes and their environmental and energy multifunctions (2013)
  • Author(s): Tohru Sekino
  • Organizer: The 7th International Conference on Materials for Advanced Technology (ICMAT2013),
  • Place of Presentation: Suntec, Singapore
  • Invited
• [Presentation] Nanostructure modification of titania nanotubes and their physicochemical functions (2013)
  • Author(s): T. Sekino, S.H. Kim, H. Tsukamoto, T. H. Kim, S. W. Lee, S.-I. Tanaka
  • Organizer: IUPAC 9th International Conference on Novel Materials and Synthesis (NMS-IX)
  • Place of Presentation: Shanghai, China
  • Invited
• [Presentation] Development of low-dimensional nanocomposites based on titania nanotubes and their multi-function (2013)
  • Author(s): T. Sekino, S.-H. Kim, T.-H. Kim, S. W. Lee, S.-I. Tanaka
  • Organizer: The 4th International Symposium on Advanced Ceramics and Technology for Sustainable Energy Applications toward a Low Carbon Society (ACTSEA2014)
  • Place of Presentation: Taipei, Taiwan
  • Invited
• [Presentation] Synthesis of oxides nano-architecture on Ti-based metal surfaces by solution chemical route and their biocompatibility (2013)
  • Author(s): Tohru Sekino, Koki Kaga, Se-Hoon Kim, Hisataka Nishida, Yoshitomo Honda, Koh-Ichi Kuremoto, Shun-Ichiro Tanaka
  • Organizer: The 30th International Japan-Korea Seminar on Ceramics (J-K Ceramics 30)
  • Place of Presentation: Fukuoka, Japan
  • Invited
• [Presentation] 低次元酸化物ナノ材料の構造修飾と多元的機能の展開 (2013)
  • Author(s): 関野 徹, 塚本浩兆, 金 世勳, Tae-Ho Kim, Soo Wohn Lee, 田中俊一郎
  • Organizer: 日本セラミックス協会第26回秋季シンポジウム
  • Place of Presentation: 信州大学、長野県長野市
  • Invited
• [Remarks] 研究室ホームページ
  • URL: http://www.sanken.osaka-u.ac.jp/labs/mmp/
• [Remarks] 融合マテリアル 研究プロジェクト A02班研究内容紹介
  • URL: http://www.fusion-materials.org/members/project/tohru-sekino.html