Yamamoto, Takashi



Faculty of Science and Technology, Department of Chemistry (Yagami)


Assistant Professor/Senior Assistant Professor

E-mail Address

E-mail address

Contact Address

3-14-1 Hiyoshi, Yokohama 223-8522

External Links

Career 【 Display / hide

  • 2004.04

    Keio University, 21st Century COE Program "Life Conjugated Chemistry", RA

  • 2006.04

    Japan Society for the Promotion of Science, Research Fellow (DC2)

  • 2007.04

    Japan Society for the Promotion of Science, Research Fellow (PD)

  • 2007.05

    University of Florida, Department of Chemistry, Visiting Scholar

  • 2008.05

    Tokyo Institute of Technology, Chemical Resources Laboratory, Postdoctoral Fellow

display all >>

Academic Background 【 Display / hide

  • 2002.03

    Keio University, Faculty of Science and Engineering, Department of Chemistry

    University, Graduated

  • 2004.03

    Keio University, Graduate School, Division of Science and Engineering, School of Fundamental Science and Technology

    Graduate School, Completed, Master's course

  • 2007.03

    Keio University, Graduate School, Division of Science and Engineering, School of Fundamental Science and Technology

    Graduate School, Completed, Doctoral course

Academic Degrees 【 Display / hide

  • Doctor of Science, Keio University, Coursework, 2007.03


Research Areas 【 Display / hide

  • Functional solid state chemistry

Research Keywords 【 Display / hide

  • Electro-Organic Chemistry

  • Inorganic Nanosheet

  • Electronic Property


Books 【 Display / hide

  • 第4版 現代界面コロイド化学の基礎

    山本 崇史・彌田 智一, 丸善, 2018

    Scope: 7章: 分子の組織化-原子、分子、ナノ粒子の配列 5節: ナノポア材料の作製法と機能 2項b: 有機系規則配列

  • Photon-Working Switches

    Yamamoto Takashi, Natsui Keisuke, Einaga Yasuaki, Springer, 2017

    Scope: Part III: Photophysics of Photoswitches, Chapter14: Photo-Modulation of Superconducting and Magnetic Property

  • 第3版 現代界面コロイド化学の基礎

    山本 崇史・彌田 智一, 丸善, 2009

    Scope: 7章: 分子の組織化-原子・分子・ナノ粒子の配列 5節: ナノポア材料の作成法と機能 2項b: 有機系

Papers 【 Display / hide

  • Weak Antilocalization and Spin Hall Effect in Pt Films Doped with Molecular Spin

    Wataru Iwamoto, Takashi Yamamoto, Kaname Tsuchii, Yuya Tazaki, Akio Asami, Hiroki Hayashi, Yasuaki Einaga, Kazuya Ando

    ACS Applied Electronic Materials (American Chemical Society (ACS))  2 ( 7 ) 2098 - 2103 2020.07

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  2637-6113

     View Summary

    © 2020 American Chemical Society. A high degree of tunability and versatility of organic chemistry has paved the way toward molecular engineering of electronic and spintronic devices. Here, we report molecular spin doping of a Pt film, the key material in spin orbitronics. The molecular spin doping using a monolayer of a metal terpyridine complex allows to control the interaction between the conduction electrons and localized magnetic moments in the Pt film. The interaction was probed by measuring the weak antilocalization, which demonstrates enhanced magnetic impurity scattering induced by the molecular spin doping. By measuring the spin-orbit torque generated by Pt doped with molecular spins, we found that the spin Hall effect is robust against the magnetic impurity scattering, showing that the significant spin-orbit coupling dominates the charge-to-spin conversion in Pt. These results demonstrate that the molecular spin doping paves the way to explore spin-orbitronics phenomena.

  • Surface Rashba-Edelstein Spin-Orbit Torque Revealed by Molecular Self-Assembly

    S. Haku, A. Ishikawa, A. Musha, H. Nakayama, T. Yamamoto, K. Ando

    Physical Review Applied (Physical Review Applied)  13 ( 4 ) 044069 2020.04

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  2331-7019

     View Summary

    © 2020 American Physical Society. © 2020 American Physical Society. We report the observation of a spin-orbit torque (SOT) originating from the surface Rashba-Edelstein effect. We find that the SOT in a prototypical spin-orbitronic system, a Pt/Co bilayer, can be manipulated by molecular self-assembly on the Pt surface. This provides evidence that the Rashba spin-orbit coupling at the Pt surface generates a sizable SOT, which is hidden by the strong bulk and interface spin-orbit coupling. We show that the molecular tuning of the surface Rashba-Edelstein SOT is consistent with density-functional-theory calculations. These results illustrate the crucial role of the surface spin-orbit coupling in the SOT generation, which alters the landscape of metallic spin-orbitronic devices.

  • Avian Influenza Virus Detection by Optimized Peptide Termination on a Boron-Doped Diamond Electrode

    Teruhiko Matsubara, Michiko Ujie, Takashi Yamamoto, Yasuaki Einaga, Tomo Daidoji, Takaaki Nakaya, Toshinori Sato

    ACS Sensors (American Chemical Society (ACS))  5 ( 2 ) 431 - 439 2020.02

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  2379-3694

     View Summary

    Copyright © 2020 American Chemical Society. The development of a simple detection method with high sensitivity is essential for the diagnosis and surveillance of infectious diseases. Previously, we constructed a sensitive biosensor for the detection of pathological human influenza viruses using a boron-doped diamond electrode terminated with a sialyloligosaccharide receptor-mimic peptide that could bind to hemagglutinins involved in viral infection. Circulation of influenza induced by the avian virus in humans has become a major public health concern, and methods for the detection of avian viruses are urgently needed. Here, peptide density and dendrimer generation terminated on the electrode altered the efficiency of viral binding to the electrode surface, thus significantly enhancing charge-transfer resistance measured by electrochemical impedance spectroscopy. The peptide-terminated electrodes exhibited an excellent detection limit of less than one plaque-forming unit of seasonal H1N1 and H3N2 viruses. Furthermore, the improved electrode was detectable for avian viruses isolated from H5N3, H7N1, and H9N2, showing the potential for the detection of all subtypes of influenza A virus, including new subtypes. The peptide-based electrochemical architecture provided a promising approach to biosensors for ultrasensitive detection of pathogenic microorganisms.

  • Enhancement of coercivity of self-assembled stacking of ferrimagnetic and antiferromagnetic nanocubes

    Keisuke Sawano, Keishi Tsukiyama, Makoto Shimizu, Mihiro Takasaki, Yuya Oaki, Takashi Yamamoto, Yasuaki Einaga, Christian Jenewein, Helmut Cölfen, Hideo Kaiju, Tetsuya Sato, Hiroaki Imai

    Nanoscale (Royal Society of Chemistry (RSC))  12 ( 14 ) 7792 - 7796 2020

    Research paper (scientific journal), Joint Work, Accepted,  ISSN  2040-3364

     View Summary

    <p>The coercivity of magnetic nanoparticles is enhanced by the exchange coupling effect at the interface of ferrimagnetic and antiferromagnetic self-assembled monolayers.</p>

  • An electrochemical aptamer-based sensor prepared by utilizing the strong interaction between a DNA aptamer and diamond.

    Asai K, Yamamoto T, Nagashima S, Ogata G, Hibino H, Einaga Y

    The Analyst (Analyst)  145 ( 2 ) 544 - 549 2019.11

    Joint Work, Accepted,  ISSN  0003-2654

     View Summary

    © 2020 The Royal Society of Chemistry. Stable and continuous biosensing of electroactive species in vivo has been achieved by using boron-doped diamond (BDD) electrodes owing to their outstanding electrochemical properties. However, the present problem in biosensing using BDD electrodes is how to specifically measure/detect the target molecules, including electrochemically inactive species. A possible solution is to fabricate an electrochemical aptamer-based (E-AB) sensor using a BDD electrode. In a preliminary investigation, we found that DNA aptamers strongly adsorb on the BDD surface and the aptamer-adsorbed BDD apparently worked as an E-AB sensor. The present study reports the performance of the aptamer-adsorbed BDD electrode as an E-AB sensor. Doxorubicin (DOX), a widely used chemotherapeutic, was chosen as a target molecule. The sensor could be prepared by just dipping BDD in an aptamer solution for only 30 min, and the electrochemical signals were dependent on the DOX concentration. The adsorption of DNA was strong enough for continuous measurements and even a sonication treatment. Such behaviors were not observed when using gold and glassy carbon electrodes. In a kinetic measurement, distortion by a sluggish response was observed for both association and dissociation phases, indicating that the interaction between DOX and the aptamer involves several kinetic processes. By fitting to a Langmuir isotherm, a limit of detection of 49 nM and a maximum detectable concentration of 2.3 μM were obtained. Although the sensitivity was lower than those of the well-established E-AB sensors of gold, the values are within a drug's therapeutic range. Overall, the present work demonstrates that a DNA aptamer and a BDD electrode is an effective combination for an E-AB sensor with stable sensitivity, and a wide variety of DNA aptamers can be applied without any special treatment.

display all >>

Papers, etc., Registered in KOARA 【 Display / hide

Reviews, Commentaries, etc. 【 Display / hide

  • ダイヤモンド電極を活用した有機電解合成

    YAMAMOTO Takashi, SAITOH Tsuyoshi, EINAGA Yasuaki

    NEW DIAMOND 34 ( 2 ) 26 - 29 2017.01

    Introduction and explanation (scientific journal), Joint Work

  • 表面修飾に基づいた室温強磁性ナノ粒子の高機能化

    YAMAMOTO Takashi

    表面科学 38 ( 1 ) 30 - 34 2017.01

    Introduction and explanation (scientific journal), Joint Work

  • 1枚で2度おいしい 光熱療法と高性能触媒へ応用できるPdナノシート

    山本 崇史

    化学 66   63 2011.07

    Introduction and explanation (commerce magazine), Single Work

  • モンモリロナイトを組み込んだ光応答性ハイブリッド体の創製

    山本 崇史・梅村 泰史・佐相 直紀・須田 理行・栄長 泰明

    粘土科学 47 ( 2 ) 51 - 56 2008.08

    Introduction and explanation (scientific journal), Joint Work

  • 光制御可能な磁性集積膜の創製

    山本 崇史・須田 理行・田口 実・栄長 泰明

    化学工業 58 ( 3 ) 174 - 179 2007.03

    Introduction and explanation (commerce magazine), Joint Work

display all >>

Presentations 【 Display / hide

  • Boron-Doped Diamond: An Electrode Material for Electro-Organic Synthesis

    Takashi Yamamoto

    8th German-Japanese Symposium on Electrosynthesis (GJSE-8), 2020.04, Oral Presentation(guest/special)

  • Electrosynthesis Using Boron-Doped Diamond

    YAMAMOTO Takashi

    International Symposium on Diamond Electrochemistry 2019 (Yokohama, JAPAN) , 2019.03, Oral Presentation(guest/special)

  • Electrochemical Organic Synthesis Using Boron-Doped Diamond Electrodes

    YAMAMOTO Takashi

    The 13th International Symposium on Organic Reactions (ISOR-13) (Hsinchu, TAIWAN) , 2018.11, Oral Presentation(guest/special)

  • ホウ素ドープダイヤモンド電極を活用した有機電解合成

    YAMAMOTO Takashi

    2018年・電気化学秋季大会 (金沢、日本) , 2018.09, Oral Presentation(guest/special)

  • Heterostructured Low-Dimensional Magnetic Materials

    YAMAMOTO Takashi

    Keio International Symposium on 2D Materials 2018 (K2D-18) (Yokohama, Japan) , 2018.02, Oral Presentation(guest/special)

display all >>

Research Projects of Competitive Funds, etc. 【 Display / hide

  • 無機ナノシートの光磁気物性の開拓とスピントロニクスへの展開


    Keio University, Grant-in-Aid for Scientific Research, Takashi Yamamoto, Grant-in-Aid for Scientific Research (C), Research grant, Principal Investigator

  • 異種界面形成に基づいた協奏的な電子物性の開拓


    Grant-in-Aid for Scientific Research, 山本 崇史, Research grant, Principal Investigator

  • 階層構造を有する多重物性システムの構築


    Grant-in-Aid for Scientific Research, 山本 崇史, Research grant, Principal Investigator

  • 電子貯蔵型階層構造の構築と整流性素子への展開


    Grant-in-Aid for Scientific Research, 山本 崇史, Principal Investigator

  • 気-液界面を利用した階層的分子複合系の構築とその光機能化


    Grant-in-Aid for Scientific Research, 山本 崇史, Research grant, Principal Investigator

Intellectual Property Rights, etc. 【 Display / hide

  • 自立性高分子薄膜

    Application No.: 2009-126425  2009.05 

    Announcement No.: 2010-275349  2010.12 

    Patent, Joint, National application

Awards 【 Display / hide

  • 令和元年度有機電子移動化学奨励賞

    2019.06, 有機電子移動化学研究会, 電子移動反応を活用した無機および有機材料の創出

    Type of Award: Other Awards

  • 学生講演賞

    2006.03, 日本化学会・第86春季年会, Co-Feプルシアンブルー超薄膜における、異方的光誘起磁化の発現

    Type of Award: Awards of National Conference, Council and Symposium


Courses Taught 【 Display / hide











display all >>

Courses Previously Taught 【 Display / hide

  • 機能デザイン工学

    Keio University, 2019, Autumn Semester, Major subject, Lecture, Lecturer outside of Keio

  • 自然科学実験 (化学)

    Keio University, 2019, Autumn Semester, General education subject, Laboratory work/practical work/exercise, Lecturer outside of Keio, 2h

  • 化学実験第1

    Keio University, 2019, Spring Semester, Major subject, Laboratory work/practical work/exercise, Lecturer outside of Keio

  • 現代化学概論

    Keio University, 2018, Autumn Semester, General education subject, Lecture, Lecturer outside of Keio

  • 自然科学実験 (化学)

    Keio University, 2018, Autumn Semester, General education subject, Laboratory work/practical work/exercise, Lecturer outside of Keio, 2h

display all >>


Social Activities 【 Display / hide

  • 地域連携授業 (川崎市立木月小学校)

  • 実験教室 (日本化学会・第97春季年会)

  • 地域連携授業 (川崎市立木月小学校)

  • 出張講義 (長野県立飯田高等学校)

  • 地域連携授業 (川崎市立木月小学校)


Memberships in Academic Societies 【 Display / hide

  • 日本化学会

  • 電気化学会, 

  • 高分子学会

  • 光化学協会

  • 日本磁気学会


display all >>

Committee Experiences 【 Display / hide

  • 2019.08

    Local Organizing Committee, The 14th International Symposium on Organic Reactions (ISOR 14)

  • 2019.08

    Local Organizing Committee, 8th German-Japanese Symposium on Electrosynthesis (GJSE-8)

  • 2019.07

    大会実行委員会委員, 2019年・電気化学秋季大会

  • 2019.05

    プログラム小委員会委員, 日本化学会・第100春季年会

  • 2019.04

    幹事, 有機電子移動化学研究会

display all >>