Study of nanomaterials transport and integration using photoinduced motion of organic crystals

2019 Fiscal Year Final Research Report

• Project/Area Number: 19K21132
• Project/Area Number (Other): 18H05986 (2018)
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund (2019); Single-year Grants (2018)
• Review Section: 0501:Physical chemistry, functional solid state chemistry, organic chemistry, polymers, organic materials, biomolecular chemistry, and related fields
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Saito Koichiro 国立研究開発法人産業技術総合研究所, エレクトロニクス・製造領域, 研究員 (00828296)
• Project Period (FY): 2018-08-24 – 2020-03-31
• Keywords: 光応答性有機材料 / アゾベンゼン / 移動現象 / 走光性 / 有機結晶 / 物質輸送

Outline of Final Research Achievements

Negative phototaxis of azobenzene crystals was demonstrated for the first time under oblique visible-light illumination. The motion was also achieved using solar simulated light including UV and near-infrared light. Fluorescent quantum dots mixed with the crystals were successfully moved on a glass surface. We realized transportation of nanomaterials from one place to another by use of the light-induced motion of the crystals. In addition, we can exclusively deposit the transported nanomaterials on the substrate by removing the crystals with methanol.

Free Research Field

光化学

Academic Significance and Societal Importance of the Research Achievements

結晶が固体表面上を光刺激によって移動する光誘起移動現象について、単一光源からの可視光照射のみで実現できる化合物を見出した。単純な低分子化合物でも光刺激に応答して生物のような走光性を実現できることが実証された点で大きな学術的意義があり、ソフトマテリアル、マイクロモーター、マイクロ流体システム等の発展にも寄与すると期待される。さらに、移動現象を利用したナノ材料運搬にも成功し、新規ナノ材料集積技術への応用可能性を示した。