理化学研究所   川合表面化学研究室   基礎科学特別研究員

2007年4月 - 2009年3月

理化学研究所   フロンティア研究システム   ジュニア・リサーチ・アソシエイト

2004年4月 - 2007年3月

Electrodeposited Gold Probe for Electrochemical Scanning Tunneling Microscopy 査読

Yuzu Kobayashi, Yasuyuki Yokota, Yasufumi Takahashi, Jun Takeya, Yousoo Kim

J. Phys. Chem. C   127 ( 28 )   13929 - 13935   2023年

Bridging Electrochemistry and Ultrahigh Vacuum: “Unburying” the Electrode-Electrolyte Interface 査読

Raymond A. Wong, Yasuyuki Yokota, Yousoo Kim

Acc. Chem. Res.   56 ( 14 )   2015 - 2025   2023年

Single-Molecule Observation of Redox Reactions Enabled by Rigid and Isolated Tripodal Molecules 査読

Yuzu Kobayashi, Yasuyuki Yokota, Raymond A. Wong, Misun Hong, Jun Takeya, Saho Osawa, Fumitaka Ishiwari, Yoshiaki Shoji, Takashi Harimoto, Keisuke Sugimoto, Yusuke Ishigaki, Takanori Suzuki, Takanori Fukushima, Yousoo Kim

J. Phys. Chem. C   127 ( 1 )   746 - 758   2023年

光電子分光法を活用した電気化学界面の電子状態探索 査読

横田泰之

表面と真空   66 ( 9 )   531 - 536   2023年

Electrochemical Tip-Enhanced Raman Spectroscopy for Microscopic Studies of Electrochemical Interfaces 査読

Yasuyuki Yokota, Misun Hong, Norihiko Hayazawa, Yousoo Kim

Surf. Sci. Rep.   77 ( 4 )   100576   2022年

Stepping beyond Cyclic Voltammetry: Obtaining the Electronic and Structural Properties of Electrified Solid-Liquid Interfaces 査読

Raymond A. Wong, Yasuyuki Yokota, Yousoo Kim

Curr. Opin. Electrochem.   34   100964   2022年

Molecular Scale Assessments of Electrochemical Interfaces: In Situ and Ex Situ Approaches 査読

Yasuyuki Yokota, Yousoo Kim

Chem. Lett.   50 ( 2 )   297 - 304   2021年

Monatomic Iodine Dielectric Layer for Multimodal Optical Spectroscopy of Dye Molecules on Metal Surfaces 査読

Yasuyuki Yokota, Raymond A. Wong, Misun Hong, Norihiko Hayazawa, Yousoo Kim

J. Am. Chem. Soc.   143 ( 37 )   15205 - 15214   2021年

Underpotential Deposition of Silver on Gold for Surface Catalysis of Plasmon-Enhanced Reduction of 4-Nitrothiophenol 査読

Misun Hong, Yasuyuki Yokota, Raymond A. Wong, Norihiko Hayazawa, Emiko Kazuma, Yousoo Kim

J. Phys. Chem. C   125 ( 30 )   16569 - 16575   2021年

Graphite Electrodes Immersed in Nonaqueous Li⁺ Electrolytes Studied with a Combined Ultrahigh Vacuum-Electrochemistry Approach 査読

Raymond A. Wong, Yasuyuki Yokota, Emiko Kazuma, Motoyuki Oniki, Yousoo Kim

J. Phys. Chem. C   125 ( 38 )   21093 - 21100   2021年

Operando Atomic Force Microscopy Study of Electric Double-Layer Transistors Based on Ionic Liquid/Rubrene Single Crystal Interfaces 査読

Yusuke Morino, Yasuyuki Yokota, Ken-ichi Bando, Hisaya Hara, Akihito Imanishi, Jun Takeya, Ken-ichi Fukui

Appl. Phys. Lett.   118 ( 24 )   243301   2021年

Homogeneous Dispersion of Aromatic Thiolates in the Binary Self-Assembled Monolayer on Au(111) via Displacement Revealed by Tip-Enhanced Raman Spectroscopy 査読

Misun Hong, Yasuyuki Yokota, Norihiko Hayazawa, Emiko Kazuma, Yousoo Kim

J. Phys. Chem. C   124 ( 24 )   13141 - 13149   2020年

Probing Consequences of Anion-Dictated Electrochemistry on the Electrode/Monolayer/Electrolyte Interfacial Properties 査読

Raymond A. Wong, Yasuyuki Yokota, Mitsuru Wakisaka, Junji Inukai, Yousoo Kim

Nat. Commun.   11   4194   2020年

Formation and Surface Structures of Highly Ordered Self-Assembled Monolayers of Alkyl Selenocyanates on Au(111) via Ambient-Pressure Vapor Deposition 査読

Seulki Han, Sicheon Seong, Young Ji Son, Yasuyuki Yokota, Tomohiro Hayashi, Masahiko Hara, Jaegeun Noh

J. Phys. Chem. C   124 ( 49 )   26730 - 26740   2020年

Self-Consistent Tip Conditioning for Tip-Enhanced Raman Spectroscopy in an Ambient Environment 査読

Yasuyuki Yokota, Misun Hong, Norihiko Hayazawa, Bo Yang, Emiko Kazuma, Yousoo Kim

J. Phys. Chem. C   124 ( 42 )   23243 - 23252   2020年

Unusual Electrochemical Properties of Low-Doped Boron-Doped Diamond Electrodes Containing sp2 Carbon 査読

Jing Xu, Yasuyuki Yokota, Raymond A. Wong, Yousoo Kim, Yasuaki Einaga

J. Am. Chem. Soc.   142 ( 5 )   2310 - 2316   2020年

Correlation Between Mobility and the Hydrogen Bonding Network of Water at an Electrified-Graphite Electrode Using Molecular Dynamics Simulation 査読

Masaya Imai, Yasuyuki Yokota, Ichiro Tanabe, Kouji Inagaki, Yoshitada Morikawa, Ken-ichi Fukui

Phys. Chem. Chem. Phys.   22 ( 3 )   1767 - 1773   2020年

Rapid Improvements in Charge Carrier Mobility at Ionic Liquid / Pentacene Single Crystal Interfaces by Self-Cleaning 査読

Yusuke Morino, Yasuyuki Yokota, Hisaya Hara, Ken-ichi Bando, Sakurako Ono, Akihito Imanishi, Yugo Okada, Hiroyuki Matsui, Takafumi Uemura, Jun Takeya, Ken-ichi Fukui

Phys. Chem. Chem. Phys.   22 ( 11 )   6131 - 6135   2020年

探針増強ラマン分光の発展: 溶液・電気化学環境測定への展開 査読

横田泰之

化学と工業   73 ( 2 )   118 - 120   2020年

電極界面の局所化学分析に向けた電気化学探針増強ラマン分光の開発 査読

横田泰之, 早澤紀彦, 楊波, 数間恵弥子, Francesca C. I. Catalan, 金有洙

表面と真空   63 ( 6 )   277 - 282   2020年

Systematic Assessment of Benzenethiol Self-Assembled Monolayers on Au(111) as a Standard Sample for Electrochemical Tip-Enhanced Raman Spectroscopy 査読

Yasuyuki Yokota, Norihiko Hayazawa, Bo Yang, Emiko Kazuma, Francesca C. I. Catalan, Yousoo Kim

J. Phys. Chem. C   123 ( 5 )   2953 - 2963   2019年

Development of Tip-Enhanced Raman Spectroscopy Based on a Scannig Tunneling Microscope in a Controlled Ambient Environment 査読

Maria Vanessa Balois, Norihiko Hayazawa, Chi Chen, Emiko Kazuma, Yasuyuki Yokota, Yousoo Kim, Takuo Tanaka

Jpn. J. Appl. Phys.   58 ( SI )   SI0801   2019年

In-Situ Spectroscopic Study on the Surface Hydroxylation of Diamond Electrodes 査読

Seiji Kasahara, Taiga Ogose, Norihito Ikemiya, Takashi Yamamoto, Keisuke Natsui, Yasuyuki Yokota, Raymond A. Wong, Shota Iizuka, Nagahiro Hoshi, Yoshitaka Tateyama, Yousoo Kim, Masashi Nakamura, Yasuaki Einaga

Anal. Chem.   91 ( 8 )   4980 - 4986   2019年

Visualization of Subnanometric Phonon Modes in a Plasmonic Nano-cavity via Ambient Tip-enhanced Raman Spectroscopy 査読

Maria Vanessa Balois, Norihiko Hayazawa, Satoshi Yasuda, Katsuyoshi Ikeda, Bo Yang, Emiko Kazuma, Yasuyuki Yokota, Yousoo Kim, Takuo Tanaka

NPJ 2D Mater. Appl.   3   38   2019年

固体/液体界面の電気二重層を真空中で精密解析する 査読

横田泰之, レイモンド A. ウォン, 金有洙

自動車技術   73 ( 7 )   116 - 117   2019年

Fabrication of Sharp Gold Tips by Three-Electrode Electrochemical Etching with High Controllability and Reproducibility 査読

Bo Yang, Emiko Kazuma, Yasuyuki Yokota, Yousoo Kim

J. Phys. Chem. C   122 ( 29 )   16950 - 16955   2018年

Structural and Dynamic Properties of 1-Butyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide / Mica and Graphite Interfaces Revealed by Molecular Dynamics Simulation 査読

Yasuyuki Yokota, Hiroo Miyamoto, Akihito Imanishi, Kouji Inagaki, Yoshitada Morikawa, Ken-ichi Fukui

Phys. Chem. Chem. Phys.   20 ( 9 )   6668 - 6676   2018年

Potential Dependent Changes in the Structural and Dynamical Properties of 1-Butyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide on Graphite Electrode Revealed by Molecular Dynamics Simulation 査読

Hiroo Miyamoto, Yasuyuki Yokota, Akihito Imanishi, Kouji Inagaki, Yoshitada Morikawa, Ken-ichi Fukui

Phys. Chem. Chem. Phys.   20 ( 29 )   19408 - 19415   2018年

Microscopic Properties of Ionic Liquid/Organic Semiconductor Interfaces Revealed by Molecular Dynamics Simulations 査読

Yasuyuki Yokota, Hiroo Miyamoto, Akihito Imanishi, Jun Takeya, Kouji Inagaki, Yoshitada Morikawa, Ken-ichi Fukui

Phys. Chem. Chem. Phys.   20 ( 18 )   13075 - 13083   2018年

Discerning the Redox-Dependent Electronic and Interfacial Structures in Electroactive Self-Assembled Monolayers 査読

Raymond A. Wong, Yasuyuki Yokota, Mitsuru Wakisaka, Junji Inukai, Yousoo Kim

J. Am. Chem. Soc.   140 ( 42 )   13672 - 13679   2018年

Potential Dependent Structure of Electric Double Layer Faced to Solid Electrode Surfaces Analyzed by Electrochemical Frequency Modulation Atomic Force Microscopy 査読

Ken-ichi Fukui, Toru Utsunomiya, Yasuyuki Yokota

Jpn. J. Appl. Phys.   56 ( 8 )   08LA03   2017年

Computational Investigations of Electronic Structure Modifications of Ferrocene-Terminated Self-Assembled Monolayers: Effects of Electron Donating/Withdrawing Functional Groups Attached on the Ferrocene Moiety 査読

Yasuyuki Yokota, Sumito Akiyama, Yukio Kaneda, Akihito Imanishi, Kouji Inagaki, Yoshitada Morikawa, Ken-ichi Fukui

Phys. Chem. Chem. Phys.   19 ( 48 )   32715 - 32722   2017年

Surface Hydrogenation of Boron-Doped Diamond Electrodes by Cathodic Reduction 査読

Seiji Kasahara, Keisuke Natsui, Takeshi Watanabe, Yasuyuki Yokota, Yousoo Kim, Shota Iizuka, Yoshitaka Tateyama, Yasuaki Einaga

Anal. Chem.   89 ( 21 )   11341 - 11347   2017年

Facet-Dependent Temporal and Spatial Changes in Boron-Doped Diamond Film Electrodes due to Anodic Corrosion 査読

Francesca C. I. Catalan, Norihiko Hayazawa, Yasuyuki Yokota, Raymond A. Wong, Takeshi Watanabe, Yasuaki Einaga, Yousoo Kim

J. Phys. Chem. C   121 ( 48 )   26742 - 26750   2017年

A Relationship Between the Force Curve Measured by Atomic Force Microscopy in an Ionic Liquid and Its Density Distribution on a Substrate 査読

Ken-ichi Amano, Yasuyuki Yokota, Takashi Ichii, Norio Yoshida, Naoya Nishi, Seiji Katakura, Akihito Imanishi, Ken-ichi Fukui, Tetsuo Sakka

Phys. Chem. Chem. Phys.   19 ( 45 )   30504 - 30512   2017年

イオン液体/ルブレン単結晶界面の周波数変調AFMによる構造解析 ～界面構造と電気二重層FET特性との相関～ 査読

横田泰之, 今西哲士, 植村隆文, 竹谷純一, 福井賢一

表面科学   38 ( 8 )   419 - 424   2017年

Gradual Improvements of Charge Carrier Mobility at Ionic Liquid/Rubrene Single Crystal Interfaces 査読

Yasuyuki Yokota, Hisaya Hara, Yusuke Morino, Ken-ichi Bando, Sakurako Ono, Akihito Imanishi, Yugo Okada, Hiroyuki Matsui, Takafumi Uemura, Jun Takeya, Ken-ichi Fukui

Appl. Phys. Lett.   108 ( 8 )   083113   2016年

Density Functional Theory Investigations of Ferrocene-Terminated Self-Assembled Monolayers: Electronic State Changes Induced by Electric Dipole Field of Coadsorbed Species 査読

Yasuyuki Yokota, Sumito Akiyama, Yukio Kaneda, Akihito Imanishi, Kouji Inagaki, Yoshitada Morikawa, Ken-ichi Fukui

J. Phys. Chem. C   120 ( 16 )   8684 - 8692   2016年

Electronic-State Changes of Ferrocene-Terminated Self-Assembled Monolayers Induced by Molecularly Thin Ionic Liquid Layers: A Combined Atomic Force Microscopy, X-ray Photoelectron Spectroscopy, and Ultraviolet Photoelectron Spectroscopy Study 査読

Yasuyuki Yokota, Yoshitada Mino, Yuta Kanai, Toru Utsunomiya, Akihito Imanishi, Ken-ichi Fukui

J. Phys. Chem. C   119 ( 32 )   18467 - 18480   2015年

Potential-Dependent Structures Investigated at the Perchloric Acid Solution / Iodine Modified Au(111) Interface by Electrochemical Frequency-Modulation Atomic Force Microscopy 査読

Toru Utsunomiya, Shoko Tatsumi, Yasuyuki Yokota, Ken-ichi Fukui

Phys. Chem. Chem. Phys.   17 ( 19 )   12616 - 12622   2015年

Molecularly Clean Ionic Liquid/Rubrene Single-Crystal Interfaces Revealed by Frequency Modulation Atomic Force Microscopy 査読

Yasuyuki Yokota, Hisaya Hara, Yusuke Morino, Ken-Ichi Bando, Akihito Imanishi, Takafumi Uemura, Jun Takeya, Ken-Ichi Fukui

Phys. Chem. Chem. Phys.   17 ( 10 )   6794 - 6800   2015年

電気二重層トランジスタの動作解明に向けたイオン液体/有機半導体界面の構造評価 査読

横田泰之

C&I Commun.   40 ( 2 )   22 - 24   2015年

Voltammetric and In Situ Frequency Modulation Atomic Force Microscopic Investigation of Phenalenyl Derivatives Adsorbed on Graphite Surface 査読

Toru Utsunomiya, Yasuyuki Yokota, Toshiaki Enoki, Yasukazu Hirao, Takashi Kubo, Ken-ichi Fukui

Carbon   77   184 - 190   2014年

Potential-Dependent Hydration Structures at Aqueous Solution/Graphite Interfaces by Electrochemical Frequency Modulation Atomic Force Microscopy 査読

Toru Utsunomiya, Yasuyuki Yokota, Toshiaki Enoki, Ken-ichi Fukui

Chem. Commun.   50 ( 98 )   15537 - 15540   2014年

Clean Surface Processing of Rubrene Single Crystal Immersed in Ionic Liquid by Using Frequency Modulation Atomic Force Microscopy 査読

Yasuyuki Yokota, Hisaya Hara, Yusuke Morino, Ken-ichi Bando, Akihito Imanishi, Takafumi Uemura, Jun Takeya, Ken-ichi Fukui

Appl. Phys. Lett.   104 ( 26 )   263102   2014年

Preferential Formation of Layered Structure of Ionic Liquid at Ionic Liquid Aqueous Solution / Graphite Electrode Interfaces Observed by Frequency-Modulation Atomic Force Microscopy 査読

Tomohiro Harada, Yasuyuki Yokota, Akihito Imanishi, Ken-ichi Fukui

e-J. Surf. Sci. Nanotech.   12   89 - 96   2014年

Fabrication of Ionic Liquid Ultrathin Film by Sequential Deposition 査読

Yusuke Morino, Yuta Kanai, Akihito Imanishi, Yasuyuki Yokota, Ken-ichi Fukui

Jpn. J. Appl. Phys.   53 ( 5S1 )   05Fy01   2014年

Comparative Studies of Photoelectron Spectroscopy and Voltammetry of Ferrocene-Terminated Self-Assembled Monolayers Possessing Different Electron-Donating Properties 査読

Yasuyuki Yokota, Yoshitada Mino, Yuta Kanai, Toru Utsunomiya, Akihito Imanishi, Matthaus Wolak, Rudy Schlaf, Ken-ichi Fukui

J. Phys. Chem. C   118 ( 20 )   10936 - 10943   2014年

Local Analyses of Ionic Liquid / Solid Interfaces by Frequency-Modulation Atomic Force Microscopy and Photoemission Spectroscopy 査読

Ken-ichi Fukui, Yasuyuki Yokota, Akihito Imanishi

Chem. Rec.   14 ( 5 )   964 - 973   2014年

Electron Transfer of Phenalenyl Derivative Molecules Adsorbed at the Graphite Electrode/Aqueous Solution Interface 査読

Toru Utsunomiya, Yasuyuki Yokota, Toshiaki Enoki, Yasukazu Hirao, Takashi Kubo, Ken-ichi Fukui

Carbon   63   196 - 201   2013年

Ferrocene-Terminated Alkanethiol Self-Assembled Monolayers: An Electrochemical and In Situ Surface-Enhanced Infra-Red Absorption Spectroscopy Study 査読

Alexander V. Rudnev, Ulmas Zhumaev, Toru Utsunomiya, Chunjie Fana, Yasuyuki Yokota, Ken-ichi Fukui, Thomas Wandlowski

Electrochim. Acta   107   33 - 44   2013年

Structural Investigation of Ionic Liquid/Rubrene Single Crystal Interfaces by Using Frequency-Modulation Atomic Force Microscopy 査読

Yasuyuki Yokota, Hisaya Hara, Tomohiro Harada, Akihito Imanishi, Takafumi Uemura, Jun Takeya, Ken-ichi Fukui

Chem. Commun.   49 ( 90 )   10596 - 10598   2013年

Ion-Pair Formation between Ferrocene-Terminated Self-Assembled Monolayers and Counteranions Studied by Force Measurements 査読

Yasuyuki Yokota, Taro Yamada, Maki Kawai

J. Phys. Chem. C   115 ( 14 )   6775 - 6781   2011年

Direct Observation of Layered Structures at Ionic Liquid/Solid Interfaces by Using Frequency-Modulation Atomic Force Microscopy 査読

Yasuyuki Yokota, Tomohiro Harada, Ken-ichi Fukui

Chem. Commun.   46 ( 45 )   8627 - 8629   2010年

Force Curve Measurements between n-Decanethiol Self-Assembled Monolayers in Inert Solvent and in Electrochemical Environment 査読

Yasuyuki Yokota, Taro Yamada, Maki Kawai

e-J. Surf. Sci. Nanotech.   7   731 - 736   2009年

表面科学関連分野での応用: 界面計測、表面修飾 (STMを用いた自己組織化単分子膜の伝導特性評価) 査読

横田泰之, 榎敏明, 原正彦

電気化学および工業物理化学   76 ( 5 )   363 - 368   2008年

電気化学環境下における分子エレクトロニクス研究 査読

横田泰之, 宮崎章, 福井賢一, 榎敏明, 玉田薫, 原正彦

表面科学   29 ( 4 )   253 - 259   2008年

Origin of Current Enhancement through a Ferrocenylundecanethiol Island Embedded in Alkanethiol SAMs by Using Electrochemical Potential Control 査読

Yasuyuki Yokota, Ken-ichi Fukui, Toshiaki Enoki, Masahiko Hara

J. Phys. Chem. C   111 ( 21 )   7561 - 7564   2007年

Strong Intermolecular Electronic Coupling within a Tetrathiafulvalene Island Embedded in Self-Assembled Monolayers 査読

Yasuyuki Yokota, Ken-ichi Fukui, Toshiaki Enoki, Masahiko Hara

J. Am. Chem. Soc.   129 ( 20 )   6571 - 6575   2007年

Dynamic and Collective Electrochemical Responses of Tetrathiafulvalene Derivative Self-Assembled Monolayers 査読

Yasuyuki Yokota, Akira Miyazaki, Ken-ichi Fukui, Toshiaki Enoki, Kaoru Tamada, Masahiko Hara

J. Phys. Chem. B   110 ( 41 )   20401 - 20408   2006年

In Situ STM Study of Potential Dependent Height Change of a Tetrathiafulvalene Derivative Embedded in Alkanethiol Self-Assembled Monolayers on Au(111) 査読

Yasuyuki Yokota, Akira Miyazaki, Ken-ichi Fukui, Toshiaki Enoki, Masahiko Hara

J. Phys. Chem. B   109 ( 50 )   23779 - 23782   2005年

Development of TTF-Based Self-Assembled Monolayer Systems and Their Electronic Properties 査読

Toshiaki Enoki, Yasuyuki Yokota, Ryota Yuge, Weixia Tu, Akira Miyazaki, Kazuyuki Takai, Ken-ichi Fukui

J. Phys. IV France   114   667 - 672   2004年

Property of Self-Assembled Monolayers of Long-Alkyl-Chain-Substituted TTF Derivative 査読

Yasuyuki Yokota, Ryota Yuge, Akira Miyazaki, Toshiaki Enoki, Masahiko Hara

Mol. Cryst. Liq. Cryst.   407   517 - 523   2003年