一つの粒子が引き起こす化学反応を用いたナノ構造体の形成と特性

• Project/Area Number: 17686079
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Nuclear engineering
• Research Institution: Osaka University
• Principal Investigator: 関 修平 Osaka University, 大学院・工学研究科, 准教授 (30273709)
• Project Period (FY): 2005 – 2007
• Project Status: Completed (Fiscal Year 2007)
• Budget Amount: ¥29,770,000 (Direct Cost: ¥22,900,000、Indirect Cost: ¥6,870,000); Fiscal Year 2007: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2006: ¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000); Fiscal Year 2005: ¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
• Keywords: LET / イオンビーム / ポリシラン / ゲル / SiC / セラミック / ナノワイヤー / 自己凝集 / 重粒子線 / イオントラック / 高分子架橋 / 共役高分子 / タンパク質 / 超微細構造

Research Abstract

高い羊ネルギーで加速された原子・イオンが材料に入射すると、粒子トラックと呼ばれる飛跡に沿った非常に局所的な範囲内に高エネルギーを付与する。ターゲットとして放射線照射によって架橋反応を引き起こす高分子を選択すると、イオンビームを照射した際に、その飛跡に沿ってイオントラック内で架橋反応を起こしゲル化することによってナノメートルスケールの円柱状のひも(ナノワイヤー)が形成される。本研究では、通常の方法では形成することの不可能な、アスペクト比500を超える超高アスペクトナノワイヤーの形成に成功した。また、ベースとなる高分子材料の化学構造を検討することにより、個々に形成されたナノワイヤーの凝集特性を制御し、1次元ナノ構造体から2次元ナノ構造シートへ成長させることに成功した。
一方で、入射する粒子の飛呈が十分確保できる場合には、異種の高分子から構成される高分子多層膜をターゲットとして、それぞれの層を構成する高分子をベースとしたナノワイヤーの"連結体"を形成できる可能性がある。ここでは溶媒に対する親媒性の大きく異なる高分子を多層化し、"連結型"ナノワイヤーの形成を試みた。高分子多層膜として極性・非極性溶媒に溶解する高分子を交互に積層して多層膜とし、それぞれの部位の親媒性の違いから、選択凝集型ナノ構造体の形成に成功した。

Research Products

• [Journal Article] Mobility and Dynamics of Charge Carrier in Rubrene Single Crystal Studied by Flash-Photolysis Microwave Conductivity and Optical Spectroscopy (2008)
  • Author(s): A. Saeki, S. Seki, T. Takenobu, Y. Iwasa, and S. Tagawa
  • Journal Title: Adv. Mater. 20 Pages: 920-923
  • Peer Reviewed
• [Journal Article] In-situ Formation of MgO/titanate Heterostructured Nanowires and Effect of Heterointerface on Transport Properties (2008)
  • Author(s): K. Nagashima, T. Yanagida, H. Tanaka, S. Seki, A. Saeki, S. Tagawa, and T. Kawai
  • Journal Title: J. Am. Chem. Soc. 130 Pages: 5378-5382
  • Peer Reviewed
• [Journal Article] Electronegative Oligothiophenes Fully Anneleated with Hexafluorocyclopentene : Synthesis, Properties, and Intrinsic Electron Mobility (2008)
  • Author(s): Y. Umemoto, Y. Ie, A. Saeki, S. Seki, S. Tagawa, and Yoshio Aso
  • Journal Title: Org. Lett. 10 Pages: 1095-1098
  • Peer Reviewed
• [Journal Article] Superstructure-Dependent Optical and Electrical Properties of Unusual Face-to-Face π-Stacked One-Dimensional Assembly of Dehydrobenzo[12]annulene in Crystalline State (2008)
  • Author(s): I. Hisaki, Y. Sakamoto, H. Shigemitsu, N. Tohnai, M. Miyata, S. Seki, A. Saeki, and S. Tagawa
  • Journal Title: Chem Eur. J. 14 Pages: 4179-4187
  • Peer Reviewed
• [Journal Article] Multi-Functional Polymer Nanowires with Ultra-high Aspect Ratio Produced by Single Particle Nano-fabrication Technique (2008)
  • Author(s): S. Seki, S. Watanabe, M. Sugimoto, S. Tagawa, and S. Tsukuda
  • Journal Title: J. Photopolym. Sci. Technol. 21 Pages: 541-543
  • Peer Reviewed
• [Journal Article] Amphiphilic Molecular Design as a Rational Strategy for Tailoring Bicontinuous Electron Donor and Acceptor Arrays : Photoconductive Liquid Crystalline O ligothophene-C60 Dyads (2008)
  • Author(s): W. S. Li, Y. Yamamoto, T. Fukushima, A. Saeki, S. Seki, S. Tagawa, H. Masunaga, S. Sasaki, M. Takata, and T. Aida
  • Journal Title: J. Am. Chem. Soc. 130 Pages: 8883-8887
  • Peer Reviewed
• [Journal Article] Optoelectronic Properties and Nanostructure Formation of o-Conjugateg Polymers (2007)
  • Author(s): S. Seki and S. Tagawa
  • Journal Title: Polymer J 39 Pages: 277-293
  • Peer Reviewed
• [Journal Article] Formation of Single Quantum Dot in Single-Walled Carbon Nanotube Channel Using Focused-Ion-Beam Technique (2007)
  • Author(s): K. Maehashi, H. Ozaki, Y. Ohno, K. Inoue, K. Matsumoto, S. Seki, and S. Tagawa
  • Journal Title: Appl. Phys. Lett. 90
  • Peer Reviewed
• [Journal Article] Cross-Linked Silicon Based Polymer Nanowire Formation by High Energy Charged Particles (2007)
  • Author(s): S. Seki, S. Tsukuda, M. Sugimoto, and S. Tagawa
  • Journal Title: Surf. Coat. Technol. 201 Pages: 8486-8489
  • Peer Reviewed
• [Journal Article] Effect of Ion Beam Energy and Polymer Weight on the Thickness of Nanowires Produced by Ion Bombardment of Polystyrene Thin Films (2007)
  • Author(s): S. Tsukuda, S. Seki, M. Sugimoto, and S. Tagawa
  • Journal Title: Surf. Coat. Technol. 201 Pages: 8526-8530
  • Peer Reviewed
• [Journal Article] Ion Beam Induced Nano-Space Reactions and Nanowire Formation in Polymers by High Energy Sub-μm Heavy Ion Beams (2007)
  • Author(s): S. Tagawa, S. Tsukuda, S. Seki, M. Sugimoto, T. Sato, M. Oikawa, and T. Sakai
  • Journal Title: Surf. Coat. Technol. 201 Pages: 8495-8498
  • Peer Reviewed
• [Journal Article] Electronic Properties of the Charge Carriers on Oligofluorene Backbone (2007)
  • Author(s): Y. Koizumi, S. Seki, A. Saeki, and S. Tagawa
  • Journal Title: Radiat. Phys. Chem. 76 Pages: 1337-1341
  • Peer Reviewed
• [Journal Article] Formation of Isolated Ultrafine Optical Nanofibers by Single Particle Nanofabrication Technique (2007)
  • Author(s): S. Seki, S. Tsukuda, S. Tagawa, M. Sugimoto, A. Watanabe, and T. Miyashita
  • Journal Title: J. Photopolym. Sci. Technol. 20 Pages: 125-128
  • Peer Reviewed
• [Journal Article] Radiation Induced One-Step One-pod Polymerization of Functional Conjugated Molecules (2007)
  • Author(s): Y. Koizumi, S. Seki, K. Okamoto, A. Saeki, and S. Seki
  • Journal Title: J. Photopolym. Sci. Technol. 20 Pages: 97-100
  • Peer Reviewed
• [Journal Article] Molecular Engineering of Coaxial Donor-Acceptor Heterojunction by Coassembly of Two Different Hexabenzocoronenes : Graphitic Nanotubes with Enhanced Photoconducting Properties (2007)
  • Author(s): Y. Yamamoto, A. Saeki, S. Seki, et al.
  • Journal Title: J. Am. Chem Soc. 129 Pages: 9276-9277
  • Peer Reviewed
• [Journal Article] Effects of Porphyrin Substituents on Film Structure and Photoelectrochemical Properties of Porphyrin-Fullerene Composite Clusters Electrophoretically Deposited on Nanostructured SnO2 Electrodes (2007)
  • Author(s): H. Imahori, S. Seki, A. Saeki, et al.
  • Journal Title: Chem Eur. J. 13 Pages: 10182-10193
  • Peer Reviewed
• [Journal Article] Electric Field Enhancement of Nano Gap of Silver Prisms (2007)
  • Author(s): K. Yamaguchi, T. Inoue, M. Fujii, M. Haraguchi, T. Okamoto, M. Fukui, S. Seki, and S. Tagawa
  • Journal Title: Chin. Phys. Lett. 24 Pages: 2934-2937
  • Peer Reviewed
• [Journal Article] Polysilane Based Organic Light Emitting Diodes : Simultaneous Ultraviolet and Visible Emission (2007)
  • Author(s): A. Sharma, M. Katiyar, Deepak, S. Seki, and S. Tagawa
  • Journal Title: J. Appl. Phys. 102 Pages: 845061-845067
  • Peer Reviewed
• [Journal Article] Polymer Nanostructure Formation by Particle Beams (2007)
  • Author(s): S. Seki, S. Tsukuda, S. Tagawa, and M. Sugimoto
  • Journal Title: ACS Symposium Series 978 Pages: 220-231
  • Peer Reviewed
• [Journal Article] Fluoropolymer Outgassing in Micro-and Nano-Fabrication (2007)
  • Author(s): Y. Matsui, S. Seki, S. Tagawa, S. Tsuji, and T. Itani
  • Journal Title: ACS Symposium Series 978 Pages: 253-260
  • Peer Reviewed
• [Journal Article] Dynamics of Photogenerated Charge Carrier and Morphology Dependence in Polythiophene Films Studied by In-Situ Time-Resolved Microwave Conductivity and Transient Absorption Spectroscopy (2007)
  • Author(s): A. Saeki, S. Seki, Y. Koizumi, and S. Tagawa.
  • Journal Title: J. Photochem. Photobiol. A 186 Pages: 158-165
  • Peer Reviewed
• [Journal Article] Correlation between Width Roughness of Nanowires and Backbone Conformation of Polymer Materials (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: Macromolecules 39 Pages: 7446-7450
• [Journal Article] Customized morphologies of Self-condensed multi-segment polymer nanowires (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: J. Phys. Chem. B 110 Pages: 19319-19322
• [Journal Article] Self-Condensed Nanoparticles of Oligofluorenes with Water-soluble Side Chains (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: J. Am. Chem Soc. 128 Pages: 9036-9037
• [Journal Article] Electrodeless Measurement of Charge Carrier Mobility in Pentacene by Microwave and Optical Spectroscopy Techniques (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: J. Appl. Phys. 100 Pages: 237031-237036
• [Journal Article] Formation of Trimer and Dimer Radical Cations of Methyl Substituted Benzenes in γ-irradiated Low Temperature Matrices (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: J. Phys. Chem. A Pages: 8073-8080
• [Journal Article] Room Temperature Ultra Violet Emission at 357 nm from Polysilane based OLEDs (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: Appl. Phys. Lett. Pages: 1435111-1435113
• [Journal Article] Cross-Linked Silicon Based Polymer Nanowire Formation by High Energy Charged Particles (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: Surf.Coat.Technol (In press)
• [Journal Article] Photogenerated Hole Mobility in DNA Measured by Time-Resolved Microwave Conductivity (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: J.Am.Chem.Soc. 128 Pages: 2213-2213
• [Journal Article] Photoconductivity in Fullerene Doped Polysilane Thin Films (2006)
  • Author(s): S.Seki, et al.
  • Journal Title: Synthetic Metal 156 Pages: 293-293
• [Journal Article] Nanowires with Controlled Sizes Formed by Single Ion Track Reactions in Polymers (2005)
  • Author(s): S.Seki, et al.
  • Journal Title: Appl.Phys.Lett. 87 Pages: 233119-233119
• [Journal Article] Effects of Backbone Configuration of Polysilanes on Nanoscale Structures Formed by Single-Particle Nanofabrication Technique (2005)
  • Author(s): S.Seki, et al.
  • Journal Title: Macromolecules 38 Pages: 10164-10164
• [Journal Article] Formation of Nanowires Based on π-Conjugated Polymers by High-Energy Ion Beam Irradiation (2005)
  • Author(s): S.Seki, et al.
  • Journal Title: Jpn.J.Appl.Phys. 44 Pages: 5839-5839
• [Presentation] 単一の粒子による高分子の3次元ナノ構造制御性 (2007)
  • Author(s): 関 修平
  • Organizer: 高分子学会 第56回 高分子討論会
  • Place of Presentation: 名古屋工業大学
  • Year and Date: 2007-09-20
• [Book] 高分子架橋と分解の新展開 (2007)
  • Author(s): 関 修平
  • Total Pages: 361
  • Publisher: CMC出版
• [Book] 放射線化学のすすめ (2006)
  • Author(s): 関 修平, 他
  • Total Pages: 320
  • Publisher: 学会出版センター
• [Book] 光応用技術・材料総覧 (2006)
  • Author(s): 関 修平, 他
  • Total Pages: 640
  • Publisher: 産業技術サービスセンター
• [Patent(Industrial Property Rights)] 高分子多段ナノワイヤー及びスターバースト型ナノ粒子とそれらの製造法 (2007)
  • Inventor(s): 関 修平, 他
  • Industrial Property Rights Holder: 大阪大学, 他
  • Industrial Property Number: 2007-064288
  • Filing Date: 2007
• [Patent(Industrial Property Rights)] イオンビーム照射によるセラミックナノワイヤーの製造法 (2007)
  • Inventor(s): 関 修平, 他
  • Industrial Property Rights Holder: 大阪大学, 他
  • Patent Publication Number: 2007-076978
  • Acquisition Date: 2007
• [Patent(Industrial Property Rights)] Ceramic Nanowire Formation by Single Particle Nano-fabrication Technique (2006)
  • Inventor(s): 関修平, 他
  • Industrial Property Rights Holder: 大阪大学原子力機構
  • Filing Date: 2006-09-14
• [Patent(Industrial Property Rights)] イオンビーム照射によるセラミックナノワイヤーの製造法 (2005)
  • Inventor(s): 関 修平, 他
  • Industrial Property Rights Holder: 大阪大学 原研
  • Industrial Property Number: 2005-269602
  • Filing Date: 2005-09-16