A rapid bacteria detection technique utilizing impedance measurement combined with positive and negative dielectrophoresis

R. Hamada, H. Takayama, Y. Shonishi, L. Mao, M. Nakano, J. Suehiro

研究成果: Contribution to journalArticle査読

57 被引用数 (Scopus)

抄録

In this study, a bacterial detection technique and device that utilizes advantages of both positive and negative dielectrophoresis (DEP) has been proposed and demonstrated. The device has two microelectrodes, which serve as a bacteria concentrator using negative DEP (n-DEP) and as a bacteria detector using positive DEP (p-DEP), respectively. Bacteria flowing into the device are repelled under action of n-DEP force exerted by the first microelectrode, and are pushed toward the second microelectrode situated at the downstream. Then concentrated bacteria are finally captured by p-DEP on the second microelectrode and detected by dielectrophoretic impedance measurement (DEPIM) method. The numerical simulations and experiments proved that n-DEP concentrator could make DEPIM sensitivity two times higher than that without n-DEP as a result of increased number of bacteria trapped on the p-DEP microelectrode.

本文言語英語
ページ(範囲)439-445
ページ数7
ジャーナルSensors and Actuators, B: Chemical
181
DOI
出版ステータス出版済み - 2013

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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