Dielectrophoretic devices fabricated by proton beam writing for concentration, assembly, and detection of nanoparticles

Toshiki Kimura, Ryousuke Kawashima, Ken Yamamoto, Satoshi Uchida, Yasuyuki Ishii, Hiroyuki Nishikawa

研究成果: Conference contribution

抄録

Dielectrophoresis (DEP) is a phenomenon with directional movement of micro particles due to the DEP force under uneven AC electric field. We utilize polymer surface with microstructures such as µm-scale pit arrays for DEP devices to assemble or concentrate nanoparticles. For micro-structuring of the polymer such as PMMA with thickness of 5-10 µm, we applied proton beam writing (PBW) which is a direct-write lithographic technique for high-aspect ratio microstructures of polymeric materials such as PMMA and epoxy resin. Pit arrays such as 5 x 5 arrays of circular pits with diameter of 5 µm on the 5-10 µm thick PMMA. We were able to demonstrate collection and assembly of gold and Ag nanoparticles (diameter of 100 to 250 nm) on the PMMA pit arrays from the colloidal suspension of the metallic nanoparticles in water. The DEP experiments were performed with the amplitude (10-20 V) and frequency (1-100 kHz) of applied ac voltages with additional dc offset voltage of less than 1V. We also discuss possible application of this technique to the detection of micro and nanoparticles such as plastics, dielectrics and metals in environmental water.

本文言語English
ホスト出版物のタイトルProceedings of 2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
出版社Institute of Electrical Engineers of Japan
ページ245-248
ページ数4
ISBN(電子版)9784886864185
出版ステータスPublished - 2020 9 13
イベント2020 International Symposium on Electrical Insulating Materials, ISEIM 2020 - Virtual, Tokyo, Japan
継続期間: 2020 9 132020 9 17

出版物シリーズ

名前Proceedings of the International Symposium on Electrical Insulating Materials
2020-September

Conference

Conference2020 International Symposium on Electrical Insulating Materials, ISEIM 2020
国/地域Japan
CityVirtual, Tokyo
Period20/9/1320/9/17

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 電子材料、光学材料、および磁性材料

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