Synergetic Electronic Property Based on the Formation of Hetero-Interface

• Project/Area Number: 25810142
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Device related chemistry
• Research Institution: Keio University
• Principal Investigator: Yamamoto Takashi 慶應義塾大学, 理工学部, 講師 (40532908)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 超伝導 / 光化学反応 / 電気化学 / 表面修飾 / フォトクロミズム / 光磁気相転移 / 外場応答性分子

Outline of Final Research Achievements

In the current research project, I have developed the photofunctional material, where superconducting properties could be modulated upon photochemical reaction.
First, I have examined the superconducting properties of a boron-doped diamond (BDD). As surface termination of BDD can be easily modified by chemical reactions, I have especially examined the superconducting properties of hydrogen- and oxygen-terminated BDD (denoted as H- and O-BDD). Critical current density was reversibly modulated between H- and O-BDD, derived from changes in the superconducting volume fraction.
Next. I have fabricated a hybrid superconductor composed of BDD and a photochromic azobenzene compound (denoted as AZ-BDD). In AZ-BDD, critical current density was reversibly modulated upon photoisomerization of AZ. The photochromism-induced amplification of critical current density was about 55 % that was 4 times larger than the previous report.

Research Products

• [Journal Article] Photochromism-Induced Amplification of Critical Current Density in Superconducting Boron-Doped Diamond with an Azobenzene Molecular Layer (2015)
  • Author(s): Keisuke Natsui, Takashi Yamamoto, Miku Akahori, Yasuaki Einaga
  • Journal Title: ACS Applied Materials & Interfaces Volume: 7 Issue: 1 Pages: 887-894
  • DOI: 10.1021/am5074613
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Modulation of Critical Current Density in Polycrystalline Boron-Doped Diamond by Surface Modification (2013)
  • Author(s): Keisuke Natsui, Takashi Yamamoto, Takeshi Watanabe, Yoichi Kamihara, Yasuaki Einaga
  • Journal Title: Physica Status Solidi B Volume: 250 Issue: 9 Pages: 1943-1949
  • DOI: 10.1002/pssb.201349058
  • Peer Reviewed
• [Presentation] ヘマグルチニン結合性ペプチドを修飾したダイヤモンド電極によるインフルエンザウイルスの高感度検出法の開発 (2016)
  • Author(s): 氏江 美智子、赤堀 未来、松原 輝彦、山本 崇史、栄長 泰明、佐藤 智典
  • Organizer: 5th Negative Strand Virus-Japan Symposium
  • Place of Presentation: ホテルモントレ沖縄 (沖縄県・国頭郡恩納村)
  • Year and Date: 2016-01-25
• [Presentation] Electrochemical Detection of Influenza Virus Using Hemagglutinin-Binding Peptide-Modified Diamond Electrode (2015)
  • Author(s): Michiko Ujie, Miku Akahori, Teruhiko Matsubara, Takashi Yamamoto, Yasuaki Einaga, Toshinori Sato
  • Organizer: The International Chemical Congress of Pacific Basin Societies 2015 (PACIFICHEM 2015)
  • Place of Presentation: Honolulu (USA)
  • Year and Date: 2015-12-15
  • Int'l Joint Research
• [Presentation] 超伝導ダイヤモンドにおける臨界電流密度の光制御 (2015)
  • Author(s): 夏井 敬介、山本 崇史、赤堀 未来、栄長 泰明
  • Organizer: 第29回・ダイヤモンドシンポジウム
  • Place of Presentation: 東京理科大学 (東京都・葛飾区)
  • Year and Date: 2015-11-17
• [Presentation] 糖鎖ミミックペプチドを修飾したダイヤモンド電極によるインフルエンザウイルスの電気化学的検出 (2015)
  • Author(s): 氏江 美智子、赤堀 未来、松原 輝彦、山本 崇史、栄長 泰明、佐藤 智典
  • Organizer: GlycoTOKYO 2015
  • Place of Presentation: 慶應義塾大学 (神奈川県・横浜市)
  • Year and Date: 2015-10-24
• [Presentation] 糖鎖模倣ペプチド固定化ダイヤモンド電極によるインフルエンザウイルスの電気化学的検出 (2015)
  • Author(s): 松原 輝彦、氏江 美智子、赤堀 未来、山本 崇史、栄長 泰明、佐藤 智典
  • Organizer: 第64回・高分子討論会
  • Place of Presentation: 東北大学 (宮城県・仙台市)
  • Year and Date: 2015-09-15
• [Presentation] Click Functionalization of Boron-Doped Diamond Electrode (2015)
  • Author(s): Takashi Yamamoto, Miku Akahori, Keisuke Natsui, Yasuaki Einaga
  • Organizer: The 21st China-Japan Bilateral Symposium on Intelligent Electrophotonic Materials and Molecular Electronics (SIEMME’21)
  • Place of Presentation: Xiamen (CHINA)
  • Year and Date: 2015-09-10
  • Int'l Joint Research / Invited
• [Presentation] ペプチド固定化ダイヤモンド電極によるヘマグルチニンおよびインフルエンザウイルスの電気化学的検出 (2015)
  • Author(s): 氏江 美智子、赤堀 未来、松原 輝彦、山本 崇史、栄長 泰明、佐藤 智典
  • Organizer: 第25回バイオ・高分子シンポジウム
  • Place of Presentation: 東京工業大学 (東京都・目黒区)
  • Year and Date: 2015-07-23
• [Presentation] ヘマグルチニン結合性ペプチドを固定したダイヤモンド電極によるインフルエンザウイルスの電気化学的検出 (2015)
  • Author(s): 氏江 美智子、赤堀 未来、松原 輝彦、山本 崇史、栄長 泰明、佐藤 智典
  • Organizer: 第64回・高分子学会年次大会
  • Place of Presentation: 札幌コンベンションセンター (北海道・札幌市)
  • Year and Date: 2015-05-27
• [Presentation] ホウ素ドープダイヤモンドにおける超伝導特性の光変調 (2014)
  • Author(s): 山本 崇史、赤堀 未来、夏井 敬介、栄長 泰明
  • Organizer: 2014年・光化学討論会
  • Place of Presentation: 北海道大学 (北海道)
  • Year and Date: 2014-10-11 – 2014-10-13
• [Presentation] Reversible Photomodulation of Superconducting Property in Boron-Doped Diamond (2014)
  • Author(s): Takashi Yamamoto, Miku Akahori, Keisuke Natsui, Yasuaki Einaga
  • Organizer: The 20th China-Japan Bilateral Symposium on Intelligent Electrophotonic Materials and Molecular Electronics (SIEMME’20)
  • Place of Presentation: Chengdu, CHINA
  • Year and Date: 2014-09-20 – 2014-09-24
  • Invited
• [Presentation] Functionalization of Superconducting Boron-Doped Diamond via Electro-Click Chemistry (2014)
  • Author(s): Miku Akahori, Keisuke Natsui, Takashi Yamamoto, Yasuaki Einaga
  • Organizer: 65th Annual Meeting of the International Society of Electrochemistry
  • Place of Presentation: Lausanne, SWITZERLAND
  • Year and Date: 2014-08-31 – 2014-09-05
• [Presentation] Photocontrollable Superconductivity in boron -Doped Diamond by Immobilizing Co-Fe Prussian Blue (2014)
  • Author(s): Keisuke Natsui, Takashi Yamamoto, Yasuaki Einaga
  • Organizer: The 14th International Conference on Molecule-Based Mangets (ICMM 2014)
  • Place of Presentation: Saint Petersburg, RUSSIA
  • Year and Date: 2014-07-05 – 2014-07-09
• [Presentation] ホウ素ドープダイヤモンドにおける超伝導特性の光制御 (2014)
  • Author(s): 夏井 敬介・赤堀 未来・山本 崇史・栄長 泰明
  • Organizer: 日本化学会・第94春季年会
  • Place of Presentation: 名古屋大学 (愛知)
• [Presentation] Boron-Doped Diamond as Superconductor (2014)
  • Author(s): Takashi Yamamoto, Keisuke Natsui, Miku Akahori, Yasuaki Einaga
  • Organizer: International Symposium on Diamond Electrochemistry
  • Place of Presentation: Yokohama, JAPAN
  • Invited
• [Presentation] Modulation of Critical Current Density in Superconducting Diamond by Surface Modification (2014)
  • Author(s): Keisuke Natsui, Takashi Yamamoto, Takeshi Watanabe, Yoichi Kamihara, Yasuaki Einaga
  • Organizer: International Symposium on Diamond Electrochemistry
  • Place of Presentation: Yokohama, JAPAN
• [Presentation] Functionalization of Boron-Doped Diamond by Surface Click Modification (2013)
  • Author(s): Miku Akahori, Keisuke Natsui, Takashi Yamamoto, Yasuaki Einaga
  • Organizer: The 19th China-Japan Bilateral Symposium on Intelligent Electrophotonic Materials and Molecular Electronics (SIEMME’19)
  • Place of Presentation: Beijing, CHINA