2023 Fiscal Year Final Research Report
Development of a three-dimensional dielectrophoretic filter for concentration and separation of micro- and nano-particles in environmental water
| Project/Area Number |
21K04140
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 21050:Electric and electronic materials-related
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| Research Institution | Shibaura Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | マイクロ・ナノプラスチック / 誘電泳動 / 陽子線描画 |
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| Outline of Final Research Achievements |
Microplastic litter, which is becoming apparent in the aquatic environment, is becoming a social problem on a global scale. Super microplastics (SMP), which are finer than microplastics (MP)including nanoparticles (NP), are extremely difficult to collect and detect. The development of MP and NP monitoring techniques to accurately assess the dynamics of nanoparticles that itinerate in environmental water and other media is a pressing need. In this study, the problem of 'how to selectively collect and detect micro/nanoparticles such as SMPs and NPs in aqueous environments, which are diverse in size and organic/inorganic composition' was addressed from the viewpoints of electrical engineering and micro/nanoengineering, with the aid of micro-pit dielectrophoresis.
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| Free Research Field |
量子ビーム応用工学 誘電体物性工学
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| Academic Significance and Societal Importance of the Research Achievements |
マイクロ・ナノ粒子の誘電泳動による選別・濃縮技術の開発への取り組みにより、ピット型誘電泳動によるサイズ300μm以下のスーパーマイクロプラスチックの捕集法を確立した。誘電泳動現象のピットサイズ・形状依存性および周波数依存性に基づき、粒子サイズ選別が可能となった。階層構造を含む三次元誘電泳動フィルタの試作とデバイス評価への取り組みにおいて、陽子線描画技術による誘電泳動デバイス用のピットパターンを試作・評価した。ドライフィルムレジスト導入による大面積デバイス作製工程を開発した。以上により、海洋モニタリングによるスーパーマイクロプラスチックの動態解明に通じて、地球規模での環境問題の解決が可能となる。
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