Voltage and current conditions for nanoparticle chain formation using dielectrophoresis

Tomoya Koshi, Yuta Nakajima, Eiji Iwase*

*この研究の対応する著者

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Here, the voltage and current conditions required to form a nanoparticle chain bridging a gap between electrodes that is several tens of micrometres wide have been examined. When a voltage is applied to a gap between electrodes covered with a dispersion of nanoparticles, the nanoparticles are trapped in the gap by dielectrophoresis, forming a nanoparticle chain. It has been considered that a nanoparticle chain is formed in a gap only when a voltage higher than a certain value with a current lower than a certain value is applied to the gap. In this work, certain voltages were first applied with changing current to a 10 ?m-wide gap between electrodes covered with a dispersion of 150 nm-diameter gold nanoparticles, and they found that a nanoparticle chain was formed only when 6.1 Vrms or more with 15 mArms or less was applied. Next, the process of nanoparticle chain formation in a 10 ?m-wide gap was directly observed with high-magnification and high-speed microscopy, and they clarified the behaviour of nanoparticle chain formation when a low voltage, high voltage with high current, and high voltage with low current were applied. Finally, they measured the critical value of current for nanoparticle chain formation in a gap several tens of micrometres wide.

本文言語English
ページ(範囲)532-535
ページ数4
ジャーナルMicro and Nano Letters
12
8
DOI
出版ステータスPublished - 2017 8月 1

ASJC Scopus subject areas

  • バイオエンジニアリング
  • 生体医工学
  • 材料科学(全般)
  • 凝縮系物理学

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