Optical motion control of maglev diamagnetic materials

• Project/Area Number: 26620073
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Functional solid state chemistry
• Research Institution: Aoyama Gakuin University
• Principal Investigator: Abe Jiro 青山学院大学, 理工学部, 教授 (70211703)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000); Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 光化学 / 磁性 / 光物性

Outline of Final Research Achievements

Graphite has been known as a typical diamagnetic material and can be levitated in the strong magnetic field. We found that the magnetically levitating pyrolytic graphite can be moved in the arbitrary place by simple photoirradiation. It is notable that the optical motion control system requires only NdFeB permanent magnets and light source. The optical movement is driven by photothermally induced changes in the magnetic susceptibility of the graphite. We found that light energy can be converted into rotational kinetic energy by means of the photothermal property. We analyzed the energy conversion efficiency and optimized the condition for increasing the rotational speed.

Research Products

• [Journal Article] Stepwise Two-photon Induced Fast Photoswitching via Electron Transfer in Higher Excited States of Photochromic Imidazole Dimer (2016)
  • Author(s): Yoichi Kobayashi, Tetsuro Katayama, Takuya Yamane, Kenji Setoura, Syoji Ito, Hiroshi Miyasaka, and Jiro Abe
  • Journal Title: J. Am. Chem. Soc. Volume: 138 Issue: 18 Pages: 5930-5938
  • DOI: 10.1021/jacs.6b01470
  • Peer Reviewed
• [Journal Article] Stealth fast photoswitching of negative photochromic naphthalene-bridged phenoxyl-imidazolyl radical complexes (2016)
  • Author(s): Katsuya Mutoh, Yoichi Kobayashi, Yasukazu Hirao, Takashi Kubo and Jiro Abe
  • Journal Title: Chemical Communications Volume: 印刷中 Issue: 41 Pages: 6797-6800
  • DOI: 10.1039/c6cc01534d
  • Peer Reviewed
• [Journal Article] Fast negative photochromism of 1,1’-binaphthyl-bridged phenoxyl-imidazolyl radical complex (2016)
  • Author(s): Tetsuo Yamaguchi, Yoichi Kobayashi and Jiro Abe
  • Journal Title: Journal of the American Chemical Society Volume: 138 Issue: 3 Pages: 906-913
  • DOI: 10.1021/jacs.5b10924
  • Peer Reviewed
• [Journal Article] Photochromic phenoxyl-imidazolyl radical complexes with decoloration rates from tens of nanoseconds to seconds (2015)
  • Author(s): Hiroaki Yamashita, Takahiro Ikezawa, Yoichi Kobayashi and Jiro Abe
  • Journal Title: Journal of the American Chemical Society Volume: 137 Issue: 15 Pages: 4952-4955
  • DOI: 10.1021/jacs.5b02353
  • Peer Reviewed / Open Access
• [Presentation] Fast photochromic molecules toward realization of photosynergetic effects (2016)
  • Author(s): Jiro Abe
  • Organizer: 9th Asian Photochemistry Conference (APC2016)
  • Place of Presentation: Nanyang Technological University
  • Year and Date: 2016-12-06
  • Int'l Joint Research / Invited
• [Presentation] Photosynergetics: Stepwise Two-photon photochromic reactions (2016)
  • Author(s): Jiro Abe
  • Organizer: International Symposium on Photochromism 2016 (ISOP2016)
  • Place of Presentation: East China University of Science and Technology
  • Year and Date: 2016-11-06
  • Int'l Joint Research / Invited
• [Presentation] ビナフチル架橋型フェノキシル－イミダゾリルラジカル複合体の逆フォトクロミズム (2016)
  • Author(s): 山口哲生、小林洋一、阿部二朗
  • Organizer: 日本化学会第96春季年会
  • Place of Presentation: 同志社大学京田辺キャンパス
  • Year and Date: 2016-03-24
• [Presentation] Photochromic phenoxyl-imidazolyl radical complexes with decoloration rates from tens of nanoseconds to seconds (2015)
  • Author(s): Hiroaki Yamashita, Takahiro Ikezawa, Yuri Lee, Yoichi Kobayashi, Jiro Abe
  • Organizer: The International Chemical Congress of Pacific Basin Societies (PACIFICHEM2015)
  • Place of Presentation: Honolulu, USA
  • Year and Date: 2015-12-17
  • Int'l Joint Research
• [Presentation] 異種ラジカル複合体の高速フォトクロミズム (2015)
  • Author(s): 山下裕明、小林洋一、阿部二朗
  • Organizer: 2015年光化学討論会
  • Place of Presentation: 大阪市立大学杉本キャンパス
  • Year and Date: 2015-09-09