金属電極／分子ナノシステム界面制御による電子・発光デバイスの構築

2012 Fiscal Year Annual Research Report

• Project Area: Emergent Chemistry of Nano-scale Molecular System
• Project/Area Number: 20111014
• Research Institution: Osaka University
• Principal Investigator: 赤井 恵 大阪大学, 工学(系)研究科(研究院), 助教 (50437373)
• Co-Investigator(Kenkyū-buntansha): 齋藤 彰 大阪大学, 工学(系)研究科(研究院), 准教授 (90294024)
• Project Period (FY): 2008-04-01 – 2013-03-31
• Keywords: 有機デバイス / ナノ材料 / 新機能デバイス / 単一分子 / 確率共鳴 / 電荷伝導 / 界面制御

Outline of Annual Research Achievements

分子ナノシステムにおける創発現象をマクロへ接続し、分子素子化を実現することを目的とし、主に有機材料のナノ分子集合体およびその界面において発現する新規な物理・化学現象を見出し、制御制御技術を追求した。
有機素子のサイズを小さくしていくことで、粒界を含まない分子結晶本来の特性が現れ、また高電界下における特殊なキャリア移動機構や低次元物性等、さまざまな新たな知見を明らかにすることが出来た。特に二次元高分子膜において観察された伝導特性はクーロンブロッケイド（CB)効果によるものと同定した。有機導体内のCB効果を示唆した報告はこれまでにほとんどなく、我々の結果は有機導体内の電荷移動に電荷反発項が大きく影響していることを示す結果となった。
またナノ分子集合体において、その個々の機能のみには収まらない新たな機能を創発する取組として、カーボンナノチューブ（CNT)を用いた２端子多経路確率共鳴素子の開発を進めた。一対の対抗電極間にＣＮＴを多数本架橋し、電極とＣＮＴ間に酸化還元作用によって電気伝導性の大きく異なることが期待できる有機分子を挿入することで、確率共鳴効果の増大が期待される。作製した素子の多経路効果を見積もったところ、ほぼ１０本程度の多経路が形成されていた。多経路効果が期待より少なかったのは、素子の作成技術がまだ発展途上である為であり、この点が解決されれば飛躍的な改善が期待出来る。この素子構造は特許申請中である。
また、STMを用いた単分子機能計測実験では、分子構造のキラリティから発現した偏光発光計測を観測した。絶縁体薄膜上に吸着した単一分子および二量体をSTMによって観察し、STM探針から注入されたトンネル電子によって発生する偏光光を同時に観察したところ、キラリティの異なる分子からは異なる偏光光が発生していることを確認し、世界初の単一分子のキラリティを見分けることに成功した。

Research Progress Status

24年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

24年度が最終年度であるため、記入しない。

Research Products

• [Journal Article] Controlled chain polymerisation and chemical soldering for singlemolecule (2012)
  • Author(s): Yuji Okawa, Megumi Akai-Kasaya, Yuji Kuwahara, Swapan K. Mandal and Masakazu Aono
  • Journal Title: Nanoscale Volume: 4 Pages: 3013 - 3028
  • Peer Reviewed
• [Journal Article] Development and Application of Multiple-Probe Scanning Probe Microscopes (2012)
  • Author(s): Tomonobu Nakayama, Osamu Kubo, Yoshitaka Shingaya, Seiji Higuchi, Tsuyoshi Hasegawa, Chun-Sheng Jiang, Taichi Okuda, Yuji Kuwahara, Kazuhiro Takami, Masakazu Aono
  • Journal Title: Adv. Mater. Volume: 24 Pages: 1675–1692
  • DOI: 10.1002/adma.201200257
  • Peer Reviewed
• [Journal Article] High-throughput reproduction of the Morpho butterfly's specific high (2012)
  • Author(s): A.Saito, J. Murase, M.Yonezawa, H. Watanabe, T. Shibuya, M. Sasaki, T. Ninomiya, S.
  • Journal Title: Proc. SPIE. Volume: 8339 - 11 V. 5 Pages: 83390C
  • DOI: 10.1117/12.915255
  • Peer Reviewed
• [Journal Article] A. Saito, Y. Tanaka, Y. Kohmura, M. Akai-Kasaya, T. Ishikawa, Y. Kuwahara, . and M. Aono (2012)
  • Author(s): Verification of Thermal Effect produced by Irradiation for Scanning Tunneling Microscope combined with Brilliant Hard X-rays from Synchrotron Radiation
  • Journal Title: Current Applied Physics Volume: 12 Pages: S52-S56
  • DOI: 10.1016/j.cap.2012.05.006
  • Peer Reviewed
• [Journal Article] Simultaneous Discrimination of Diameter, Handedness, and Metallicity of Single-Walled (2012)
  • Author(s): Liu, Gang; Wang, Feng; Chaunchaiyakul, Songpol; Saito, Yukie; Bauri, Ajoy; Kimura, Takahide; Kuwahara, Yuji; Komatsu, Naoki、
  • Journal Title: J. Am. Chem. Soc. Volume: 135 Pages: 4805−4814
  • DOI: ja-2012-12519s.R1
  • Peer Reviewed
• [Presentation] Simulation analysis on the optical role of the various structural disorder in the Morpho butterfly's color, (2013)
  • Author(s): Akira SAITO, M.Yonezawa, T.Shibuya, M.Akai-Kasaya, Y.Kuwahara
  • Organizer: SPIE Smart Structures and Materials & Nondestructive Evaluation and Health Monitoring
  • Place of Presentation: Town and Country Resort and Convention Center, San Diego, California, USA
  • Year and Date: 2013-03-10 – 2013-03-14
  • Invited
• [Presentation] Theoretical Analysis on the Optical Role of Various ano-Randomness for (2013)
  • Author(s): Akira SAITO, T.Shibuya, M.Yonezawa, K. Ishibashi, M.Akai-Kasaya, Y.Kuwahara
  • Organizer: The 13th Int'l Sympo. on biomimetic Materials Processing,
  • Place of Presentation: Hotel Associa Takayama Resort, Takayama, Japan
  • Year and Date: 2013-01-23 – 2013-01-25
  • Invited
• [Presentation] on-equilibrium structural fluctuation of one-dimensional polydiacetylene nanowire (2013)
  • Author(s): Megumi Akai-Kasaya, Yuji Kuwahara1 and Masakazu Aono
  • Organizer: The Symposium on Surface and Nano Science 2013 (SSNS’13)
  • Place of Presentation: Hotel Jurin Miyagi Japan
  • Year and Date: 2013-01-15 – 2013-01-18
  • Invited
• [Presentation] New Aspects of Nanoscale Observation by Synchrotron-Radiation- Based Scanning Tunneling Microscopy (2012)
  • Author(s): Akira SAITO, H. Matsuno, T. Tanaka, H. Miki, Y. Furudate, Y. Takagi, M. Akai-Kasaya, Y. Tanaka, Y. Kohmura, T. Ishikawa, Y. Kuwahara and M. Aono
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Nakanoshima-Center, Osaka University, Japan
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Optical Properties of Organic Molecular Nanosystems Studied by STM-induced-light Emission Technique (2012)
  • Author(s): Y. Kuwahara, A. Fujiki, K. Harada, M. Akai-Kasaya, A. Saito, and T. Uemura
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Nanoscale Evaluation of Optical Activity of Chiral Organic Molecule Studied by Scanning Tunneling Microscopy Light Emission Technique (2012)
  • Author(s): A. Fujiki, K. Harada, Y. Miyake, M. Akai-Kasaya, Y. Oshikane, A. Saito and Y. Kuwahara
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Analysis of Circular Polarized Light Emission from Chiral Organic Molecules by STM-induced Light Emission Spectroscopy (2012)
  • Author(s): K. Harada, A. Fujiki, M. Akai-Kasaya, A. Saito, H. Osuga, and Y. Kuwahara
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Development of two-terminal stochastic resonance device (2012)
  • Author(s): T. Nakanishi, M. Akai-Kasaya, A. Saito and Y. Kuwahara
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Carrier transport property of rubrene single-crystal transistors (2012)
  • Author(s): Y. Iwami, M. Akai-Kasaya, T. Uemura, J. Takeya, A. Saito and Y. Kuwahara
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Elemental analysis of nano-domain on semiconductor or metal surface using SR-STM -Evaluation of elemental contrast for various interfaces- (2012)
  • Author(s): H. Matsuno, A. Saito, H. Miki, Y. Furudate, Y. Takagi, Y. Tanaka, Y. Kohmura, M. Akai-Kasaya, T. Ishikawa, Y. Kuwahara, and M. Aono
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Optical Design of Nano-Randomness for the Morpho-type Color Materials - Fabrication and Theoretical Calculation - (2012)
  • Author(s): T. Shibuya , M. Yonezawa, K. Ishibashi, M. Akai-Kasaya, Y. Kuwahara, and A. Saito
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Tunneling-current-induced Light Emission from Selectively-extracted Single-walled Carbon Nanotubes (2012)
  • Author(s): S. Chaunchaiyakul, A. Fujiki, Y. Miyake, K. Harada, M. Akai-Kasaya, A. Saito, N. Komatsu and Y. Kuwahara
  • Organizer: 5th International Symposium on Atomically Controlled Fabrication Technology
  • Place of Presentation: Osaka University Nakanoshima Center, Osaka,
  • Year and Date: 2012-10-21 – 2012-10-24
• [Presentation] Optical Activities of Chiral Organic Molecules Evaluated byScanning Tunneling Microscopy Light Emission Technique (2012)
  • Author(s): A. Fujiki, K. Harada, S.Chaunchaiyakul, Y. Miyake,M. Akai-Kasaya, A. Saito, Y.Kuwahara
  • Organizer: Fourteenth International Conference on Vibration at Surfaces (VAS14)
  • Place of Presentation: Nichii-Gakkan @ Kobe port island, Japan
  • Year and Date: 2012-09-10 – 2012-09-14
• [Presentation] Nanoscale elemental analysis and applications using STM combined with brilliant hard X-rays (2012)
  • Author(s): Akira SAITO, T. Tanaka, H. Matsuno, H. Miki, Y. Furudate, Y. Takagi, M. Akai-Kasaya, Y. Tanaka, Y. Kohmura, T. Ishikawa, Y. Kuwahara and M. Aono
  • Organizer: The 13th edition of Trends in Nanotechnology International Conference (TNT2012)
  • Place of Presentation: Escuela Técnica Superior de Ingenieros Industriales (ETSII Madrid - UPM)
  • Year and Date: 2012-09-10 – 2012-09-14
  • Invited
• [Presentation] Nonlinear charge transport in two-dimensional polymer monolayer (2012)
  • Author(s): M. Akai-Kasayaa, S. Naganob, A. Saitoa and Y. Kuwaharaa
  • Organizer: AsiaNANO 2012 (6th in the series of Asian Conference on Nanoscience & Nanotechnology )
  • Place of Presentation: JW Marriott Cancun Resort and Spa & Marriott Casa Magna Cancun
  • Year and Date: 2012-09-07 – 2012-09-10
  • Invited
• [Presentation] Reproduction & Applications of the Morpho-Butterfly's Specific Colors (2012)
  • Author(s): Akira SAITO, M.Yonezawa, T.Shibuya, K.Ishibashi, M.Akai-Kasaya, Y.Kuwahara
  • Organizer: AsiaNANO 2012 (6th in the series of Asian Conference on Nanoscience & Nanotechnology )
  • Place of Presentation: Crowne Plaza Lijiang Ancient Town
  • Year and Date: 2012-09-07 – 2012-09-10
  • Invited
• [Presentation] Nonlinear charge transport in two-dimensional polymer monolayer (2012)
  • Author(s): M. Akai-Kasaya, S. Nagano, A. Saito and Y. Kuwahara
  • Organizer: XXI International Materials Research Congress (IMRC) 2012
  • Place of Presentation: JW Marriott Cancun Resort and Spa & Marriott Casa Magna Cancun
  • Year and Date: 2012-08-12 – 2012-08-17
• [Presentation] Nonlinear and Two-dimensional carrier transport in P3HT(100) monolayer (2012)
  • Author(s): M. Akai-Kasaya, Y. Okuaki1, S. Nagano, A. Saito and Y. Kuwahara
  • Organizer: 16th edition of the International Conference on Solid Films and Surfaces (ICSFS-16)
  • Place of Presentation: Faculty of Architecture of the University of Genoa, Genoa (Italy)
  • Year and Date: 2012-06-01 – 2012-06-06
• [Presentation] Nonlinear transport in two-dimensional polymer monolayer (2012)
  • Author(s): M. Akai-Kasaya, Y. Okuaki, S. Nagano, A. Saito and Y. Kuwahara
  • Organizer: The 10th International Symposium on Electrokinetic Phenomena (ELKIN 10th)
  • Place of Presentation: Tsukuba University, Japan.
  • Year and Date: 2012-05-20 – 2012-05-24