Photofunctions of Highly Ordered TiO_2-DNA Nanostructures

• Project/Area Number: 19750115
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Functional materials chemistry
• Research Institution: Osaka University
• Principal Investigator: TACHIKAWA Takashi Osaka University, 産業科学研究所, 助教 (20432437)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,050,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥150,000); Fiscal Year 2008: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2007: ¥2,400,000 (Direct Cost: ¥2,400,000)
• Keywords: 光物性 / 表面・界面 / 機能触媒 / 二酸化チタン光触媒 / ナノ粒子 / DNA / 単一分子蛍光分光法 / 電子移動反応 / 光化学

Research Abstract

二酸化チタン(TiO_2)光触媒への紫外光照射によって生じる酸化還元力や超親水性などを医学、医療や関連する周辺領域に応用することは、安全で豊かな社会の創成に役立つ重要な研究課題である。本研究では、分子レベルでTiO_2-DNAナノ複合体を構築および制御する方法論を確立し、ミスマッチ塩基配列の検出を目的としたナノバイオセンサーの開発を行った。また、TiO_2ナノ粒子表面における光反応を単一粒子および単一分子レベルで観測する新しい実験手法を確立した。

Research Products

• [Journal Article] Single-Molecule Observation of Photocatalytic Reaction in TiO_2 Nanotube : Importance of Molecular Transport through Porous Structures (2009)
  • Author(s): K. Naito, T. Tachikawa, M. Fujitsuka, and T. Majima
  • Journal Title: J. Am. Chem. Soc. 131(3) Pages: 934-936
• [Journal Article] Photoreactivity of As-Fabricated Au Clusters at the Single-Cluster Level (2009)
  • Author(s): Masanori Sakamoto
  • Journal Title: Journal of the American Chemical Society 131 Pages: 6-7
  • Peer Reviewed
• [Journal Article] Single-Molecule Observation of Photocatalytic Reaction in TiO_2 Nanotube : Importance of Molecular Transport through Porbus Structures (2009)
  • Author(s): Kazuya Naito
  • Journal Title: Journal of the American Chemical Society 131 Pages: 934-936
  • Peer Reviewed
• [Journal Article] Real-Time Single-Molecule Imaging of the Spatial and Temporal Distribution of Reactive Oxygen Species with Fluorescent Probes : Applications to TiO_2 Photocatalysts (2008)
  • Author(s): K. Naito, T. Tachikawa, M. Fujitsuka, and T. Majima
  • Journal Title: J. Phys. Chem. C 112(4) Pages: 1048-1059
• [Journal Article] Photocatalytic Cleavage of Single TiO_2/DNA Nanoconjugates (2008)
  • Author(s): T. Tachikawa, Y. Asanoi, K. Kawai, S. Tojo, A. Sugimoto, M. Fujitsuka, T. Majima
  • Journal Title: Chem. -Eur. J. 14(5) Pages: 1492-1498
• [Journal Article] Defect-Mediated Photoluminescence Dynamics of Eu^<3+> - Doped TiO 2 Nanocrystals Revealed at the Single-Particle or Single-Aggregate Level (2008)
  • Author(s): Takashi Tachikawa
  • Journal Title: Angewandte Chemie International Edition 47 Pages: 5348-5352
  • Peer Reviewed
• [Journal Article] Photoinduced Charge Transfer Processes on MOF-5 Nanoparticles : Elucidating Differences between Metal-Organic Frameworks and Semiconductor Metal Oxides (2008)
  • Author(s): Takashi Tachikawa
  • Journal Title: The Journal of Physical Chemistry C 112 Pages: 14090-14101
  • Peer Reviewed
• [Journal Article] Two-laser-guided Three-dimensional Microfabrication and Processing in Flexible Polymer Matrix (2008)
  • Author(s): Masanori Sakamoto
  • Journal Title: Advanced Materials 20 Pages: 3427-3432
  • Peer Reviewed
• [Journal Article] Iodine-Doped TiO_2 Photocatalysts : Correlation Between Band Structure and Mechanism (2008)
  • Author(s): Sachiko Tojo
  • Journal Title: The Journal of Physical Chemistry C 112 Pages: 14948-14954
  • Peer Reviewed
• [Journal Article] Interfacial Electron Transfer Dynamics in a Single CdTe Quantum Dot-Pyromellitimide Conjugate (2008)
  • Author(s): Shi-Cong Cui
  • Journal Title: The Journal of Physical Chemistry C 112 Pages: 19625-19634
  • Peer Reviewed
• [Journal Article] Photocatalytic Cleavage of Single TiO_2/DNA Nanoconjugates (2008)
  • Author(s): Takashi TacMkawa
  • Journal Title: Chemistry-A European Journal 14 Pages: 1492-1498
  • Peer Reviewed
• [Journal Article] Real-Time Single-Molecule Imaging of the Spatial and Temporal Distribution of Reactive Oχygen Species: Applications to TiO_2 Photocatalysts (2008)
  • Author(s): Kazuya Naito
  • Journal Title: The Journal of Physical Chemistry C 112 Pages: 1048-1059
  • Peer Reviewed
• [Journal Article] Protein Recording Material: Photorecord/Erasable Protein Array Using a UV-Eliminative Ldnker (2008)
  • Author(s): Koji Nakayama
  • Journal Title: Langmuir 24 Pages: 1625-1628
  • Peer Reviewed
• [Journal Article] Three-Dimensional Writing of Copper Nanoparticles in a Polymer Matrix with Two-Color Laser Beams (2008)
  • Author(s): Masanori Sakamoto
  • Journal Title: Chemistry of Materials 20
  • Peer Reviewed
• [Journal Article] Nanoscopic Heterogeneities in Adsorption and Electron Transfer Processes of Perylene Diimide Dye on TiO_2 Nanop articles Studied by Single-Molecule Fluorescence Spectroscopy (2007)
  • Author(s): Takashi Tachikawa
  • Journal Title: Chemical Physics Letters 443 Pages: 313-318
  • Peer Reviewed
• [Journal Article] Single-Molecule Detection of Reactive Oχygen Species: Application to Photocatalytic Reactions (2007)
  • Author(s): Takashi Tachikawa
  • Journal Title: Journal of Fluorescence 17 Pages: 727-738
  • Peer Reviewed
• [Journal Article] Fabrication of Chromophore-Functionalized Gold Nanoparticles-Poly(Vinyl alcohol) Thin Film Nanocomposite: New Coordination Method using the Ni(II)-Nitrilotriacetic acid Complex Formation (2007)
  • Author(s): Masanori Sakamoto
  • Journal Title: ChemPhys Chem 8 Pages: 1701-1706
  • Peer Reviewed
• [Presentation] MOF-5ナノ粒子による芳香族化合物の光誘起一電子酸化反応 (2009)
  • Author(s): 立川貴士
  • Organizer: 日本化学会第89春季年会(2009)
  • Place of Presentation: 千葉県船橋市
  • Year and Date: 2009-03-28
• [Presentation] CdTe量子ドット-ピロメリットイミド複合体における光誘起電子移動反応の単一粒子発光観測 (2009)
  • Author(s): 立川貴士
  • Organizer: 日本化学会第89春季年会(2009)
  • Place of Presentation: 千葉県船橋市
  • Year and Date: 2009-03-27
• [Presentation] Eu^<3+>ドープTiO_2の単一粒子発光観測 (2008)
  • Author(s): 立川貴士
  • Organizer: 光化学討論会2008
  • Place of Presentation: 大阪府堺市
  • Year and Date: 2008-09-12
• [Presentation] TiO_2-DNAナノ複合体における光触媒反応の単一分子観測 (2008)
  • Author(s): 立川貴士・麻野井祥明・川井清彦・藤塚守・真嶋哲朗
  • Organizer: 日本化学会第88春季年会
  • Place of Presentation: 立教大学池袋キャンパスおよび立教池袋中学校・高等学校
  • Year and Date: 2008-03-27
• [Presentation] Photoinduced Charge Separation in Titania Nanotubes (2008)
  • Author(s): T. Tachikawa, S. Tojo, M. Fujitsuka, T. Sekino, T. Majima
  • Organizer: The 9th International Symposium on Eco-Materials Processing & Design in conjunction with Core University Program (CUP) Seminar 2008
  • Place of Presentation: Masan, Korea
• [Presentation] Photoinduced Charge Separation in Titania Nanotubes (2008)
  • Author(s): Takashi Tachikawa
  • Organizer: The 9th International Symposium on Eco-MaterialsProcessing & Design in conjunction with CoreUniversity Program (CUP) Seminar 2008
  • Place of Presentation: Masan, Korea
• [Presentation] 酸化チタン光触媒表面から拡散した酸素活性種の単一分子検出 (2007)
  • Author(s): 立川貴士・内藤一也・藤塚守・真嶋哲朗
  • Organizer: 2007光化学討論会
  • Place of Presentation: 信州大学松本キャンパス
  • Year and Date: 2007-09-26
• [Presentation] 酸化チタン光触媒表面から拡散した酸素活性種の単一分子検出 (2007)
  • Author(s): 立川 貴士
  • Organizer: 光化学討論会2008
  • Place of Presentation: 長野県松本市
  • Year and Date: 2007-09-26
• [Presentation] 水中におけるペリレンナノ結晶成長過程の単一粒子観察 (2007)
  • Author(s): 立川 貴士
  • Organizer: 光化学討論会2008
  • Place of Presentation: 長野県松本市
  • Year and Date: 2007-09-26
• [Book] "Single-Molecule Fluorescence Imaging Techniques for the Detection of Reactive Oxygen Species" in Modern Research and Educational Topics in Microscopy(FORMATEX, Spain) (2007)
  • Author(s): T. Tachikawa and T. Majima
• [Book] Single-Molecule Fluorescence Imaging Techniques for the Detection of Reactive Oχygen Species in Modem Research and Educational Topics in Microscopy (2007)
  • Author(s): Takashi Tachikawa
  • Total Pages: 9
  • Publisher: FORMATEX, Spain
• [Remarks]
  • URL: http://www.sanken.osaka-u.ac.jp/labs/mec/index.html