Conductivity measurement of single molecule using self-assembled monolayer formed onvarious electrode surfaces

• Project/Area Number: 19750102
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Functional materials chemistry
• Research Institution: Hokkaido University
• Principal Investigator: TAKAKUSAGI Satoru Hokkaido University, 触媒化学研究センター, 准教授 (30359484)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥3,500,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥2,200,000 (Direct Cost: ¥2,200,000)
• Keywords: 自己組織化単分子層 / 単一分子電気伝導 / 電気化学走査型トンネル顕微鏡 / ナノコンタクト / ナノ材料 / 表面界面物性 / 電気伝導性 / 走査型プローブ顕微鏡

Research Abstract

再現性の高い単一分子の電気伝導測定を可能とすることを目的とし、金上のチオール、シリコン上Si-C 結合を介した単分子層等の自己組織化単分子層(SAM)上に、合成化学的手法を用いて金属層を析出させ、構造のよく規制された金属層-SAM-金属(または半導体)基板からなる接合構造の作成法を確立した。また実際に電気伝導測定を行って電荷移動機構を明らかにした。さらにフェルミ準位付近に分子軌道を有し、多電子酸化還元能を示すルテニウム二核錯体を骨格に含むSAM を金表面上に形成し、電気化学走査型トンネル顕微鏡を用いて、分子一個ずつを識別しながら電気伝導性の評価を行った。分子の像輝度(トンネル電流の流れやすさ)は、探針、基板、分子軌道のエネルギーレベルの相対位置により変化し、軌道を介した共鳴トンネリングによる電子伝導パスが存在すると解釈した。

Research Products

• [Journal Article] Electrodeposition of Ag and Pd on a Reconstructed Au(111) Electrode Surface Studied by In situ Scanning Tunneling Microscopy (2009)
  • Author(s): S.Takakusagi, K. Kitamura, K. Uosaki
  • Journal Title: Electrochim. Acta (印刷中)
  • NAID: 120001702439
  • Peer Reviewed
• [Journal Article] Stability of underpotentially deposited Ag layers on a Au(111) surface studied by surface X-ray scattering (2009)
  • Author(s): T. Kondo, S. Takakusagi, K. Uosaki
  • Journal Title: Electrochem.Comm. 11 Pages: 804-807
  • NAID: 120001702438
  • Peer Reviewed
• [Journal Article] Stability of underpotentially deposited Ag layers on a Au(111)surface studied by surface X-ray scattering (2009)
  • Author(s): Toshihiro Kondo
  • Journal Title: Electrochemistry Communications 11 Pages: 804-807
  • Peer Reviewed
• [Journal Article] Adsorption Structure of Acetic Anhyhdride on a TiO_2(110)Surface Observed by Scanning Tunneling Microscopy (2009)
  • Author(s): Kumiko Kinoshita
  • Journal Title: Surface Science 603 Pages: 552-557
  • Peer Reviewed
• [Journal Article] High-Density Monolayer of Caged, Compact Phosphine Ligand on Gold Surface: Remarkable Reusability in Rh Catalysis (2008)
  • Author(s): K. Hara, R. Akiyama, S. Takakusagi, K. Uosaki, T. Yoshino, H. Kagi, M. Sawamura
  • Journal Title: Angew. Chem. Int. Ed. 47 Pages: 1-5
  • Peer Reviewed
• [Journal Article] In situ Real-time Monitoring of Electrochemical Ag deposition on a Reconstructed Au(111) Studied by Scanning Tunneling Microscopy (2008)
  • Author(s): S. Takakusagi, K. Kitamura, K. Uosaki
  • Journal Title: J. Phys. Chem. C 112 Pages: 3073-3077
  • Peer Reviewed
• [Journal Article] Hydrophilicity transition of the clean rutile TiO_2(110)surface (2008)
  • Author(s): Daniel Hennessy
  • Journal Title: Electrochimica Acta 53 Pages: 6173-6177
  • Peer Reviewed
• [Journal Article] High-Density Monolayer of Caged, Compact Phosphine Ligand on Gold Surface : Remarkable Reusability in Rh Catalysis (2008)
  • Author(s): Kenji Hara
  • Journal Title: Angewandte Chemie International Edition 47 Pages: 1-5
  • Peer Reviewed
• [Journal Article] Spontaneous Rapid Growth of Triruthenium Cluster-based Multilayers on Gold Surfaces. Cyclic Voltammetric In Situ Monitoring and AFM Characterization (2008)
  • Author(s): Takayuki Michi
  • Journal Title: Chemistry Letters 37 Pages: 576-577
  • Peer Reviewed
• [Journal Article] Electrocatalytic Activity for Oxygen Reduction of Multilayer of Pd Coated Gold Nanoclusters (2008)
  • Author(s): Motoko Harada
  • Journal Title: Transactions of the Materials Research Society of Japan 33 Pages: 145-148
  • Peer Reviewed
• [Journal Article] In situ Real-time Monitoring of Electrochemical Ag deposition on a Rec-onstructed Au (111) Studied by Scanning Tunneling Microscopy (2008)
  • Author(s): Satoru Takakusagi
  • Journal Title: Journal of Physical Chemistry C 112 Pages: 3073-3077
  • Peer Reviewed
• [Journal Article] Functionalization of Silicon Surfaces with Catalytically Active Pd Complexes and Application to the Aerobic Oxidation of Benzylic Alcohols (2007)
  • Author(s): K. Hara, S. Tayama, H. Kano, T. Masuda, S. Takakusagi, T. Kondo, K. Uosaki, M. Sawamura
  • Journal Title: Chem. Commun. Pages: 4280-4282
  • Peer Reviewed
• [Journal Article] Structure of Au(111) and Au(100) Single Crystal Electrode Surfaces at Various Potentials in Sulfuric Acid Solution Determined by In situ Surface X-ray Scattering (2007)
  • Author(s): T. Kondo, J. Morita, K. Hanaoka, S. Takakusagi, K. Tamura, M. Takahasi, J. Mizuki, K. Uosaki
  • Journal Title: J. Phys. Chem. C 111 Pages: 13197-13204
  • Peer Reviewed
• [Journal Article] Photoanodic Formation of an Organic Monolayer on a Hydrogen-terminated Si(111) Surface via Si-C Covalent Bond Using a Grignard Reagent and its Application for One-step Monolayerpatterning (2007)
  • Author(s): S. Takakusagi, T. Miyasaka, K. Uosaki
  • Journal Title: J. Electroanal. Chem. 599 Pages: 344-348
  • Peer Reviewed
• [Journal Article] Photoanodic Formation of an Organic Monolayer on a Hydrogen-terminated si (111) Surface via Si-C Covalent Bond Using a Grignard Reagent and its Application for One-step Monolayer-patterning (2007)
  • Author(s): Satoru Takakusagi
  • Journal Title: Journal of Electroanalytical Chemistry 599 Pages: 344-348
  • NAID: 120000966953
  • Peer Reviewed
• [Journal Article] Functionalization of Silicon Surfaces with Catalytically Active Pd Compl-exes and Application to the Aerobic Oxidation of Benzylic Alcohols (2007)
  • Author(s): Kenji Hara
  • Journal Title: Chemical Communications Pages: 4280-4282
  • Peer Reviewed
• [Journal Article] Construction of Self-assembled Monolayer Terminated with N-Heterocyclic Carbene-Rhodium (I) Complex Moiety (2007)
  • Author(s): Kenji Hara
  • Journal Title: Surface Science 601 Pages: 5127-5132
  • Peer Reviewed
• [Journal Article] Structure of Au (111) and Au (100) Single Crystal Electrode Surfaces at Various Potentials in Sulfuric Acid Solution Determined by In situ Surface X-ray Scattering (2007)
  • Author(s): Toshihiro Kondo
  • Journal Title: Journal of Physical Chemistry C 111 Pages: 13197-13204
  • Peer Reviewed
• [Presentation] ウェット法によるTiO_2単結晶の表面修飾とその特性 (2009)
  • Author(s): 高草木達
  • Organizer: 日本化学会第89春季年会
  • Place of Presentation: 船橋
  • Year and Date: 2009-03-28
• [Presentation] Structure of Au nanoclusters on Ti02(110)surface studied by polarisation dependent total-reflection fluorescence(PTRF)XAFS (2009)
  • Author(s): Satoru Takakusagi
  • Organizer: 6th International Workshop on Oxide Surfaces(IWOX-VI)
  • Place of Presentation: Schladming
  • Year and Date: 2009-01-20
• [Presentation] 偏光全反射蛍光XAFS法によるTiO_2(110)上Auナノクラスターの構造解析 (2008)
  • Author(s): 高草木達
  • Organizer: 第28回表面科学講演大会
  • Place of Presentation: 東京
  • Year and Date: 2008-11-15
• [Presentation] Effect of Electrode Potential on Ag Deposition on a Reconstructed Au(111)Surface Studied by In situ Scanning Tunneling Microscopy (2008)
  • Author(s): Satoru Takakusagi
  • Organizer: The 5th International Symposium on Surface Science and Nanotechnology
  • Place of Presentation: 東京
  • Year and Date: 2008-11-10
• [Presentation] Polarization Dependent Total-Reflection Fluorescence (PTRF) XAFS Study on Structure of Au Nanoclusters on TiO2(110)surface (2008)
  • Author(s): Satoru Takakusagi
  • Organizer: CRC International Symposium on Bio-interface and Biomass Conversion
  • Place of Presentation: 札幌
  • Year and Date: 2008-10-30
• [Presentation] 分子-電極接合形成過程のXAFS による構造解析 (2008)
  • Author(s): 高草木達
  • Organizer: PF 研究会「電気化学への放射光利用X 線技術の応用」
  • Place of Presentation: KEK(つくば)
  • Year and Date: 2008-08-05
• [Presentation] 分子-電極接合形成過程のXAFSによる構造解析 (2008)
  • Author(s): 高草木達
  • Organizer: PF研究会「電気化学への放射光利用X線技術の応用」
  • Place of Presentation: つくば
  • Year and Date: 2008-08-05
• [Presentation] 走査型トンネル顕微鏡(STM)による再構成したAu(111)表面上への電気化学的Ag析出過程のその場追跡 (2008)
  • Author(s): 高草木達
  • Organizer: 日本化学会第88春季年会
  • Place of Presentation: 立教大学
  • Year and Date: 2008-03-28
• [Presentation] Potential dependent electrodeposition process of Ag on a reconstructed Au(111) surface studied by in situ scanning tunneling microscopy (2008)
  • Author(s): S. Takakusagi, K. Kitamura, K. Uosaki
  • Organizer: International mini-Symposium on Control and Analysis of Reactions at Electrolyte/Solution Interface with Atomic/ Molecular Resolution
  • Place of Presentation: Sapporo
  • Year and Date: 2008-03-10
• [Presentation] Potential Dependent Electrodeposition Process of Ag on a Reconstructed Au (111) Surface Studied by in situ Scanning Tunneling Microscopy (2008)
  • Author(s): Satoru Takakusagi
  • Organizer: International mini-Symposium on Control and Analysis of Reactions at Electrode/Solution Interface with Atomic/Molecular Resolution
  • Place of Presentation: 北海道大学
  • Year and Date: 2008-03-10
• [Presentation] 再構成したAu(111)電極表面上へのAg析出における電極電位の効果 (2007)
  • Author(s): 高草木 達
  • Organizer: 第27回表面科学講演大会
  • Place of Presentation: 東京大学生産技術研究所
  • Year and Date: 2007-11-01
• [Remarks]
  • URL: http://pchem.sci.hokudai.ac.jp/