Flexible manipulation of microfluids using optically regulated adsorption/desorption of hydrophobic materials

Hidenori Nagai*, Takashi Irie, Junko Takahashi, Shin ichi Wakida

*この研究の対応する著者

研究成果: Article査読

35 被引用数 (Scopus)

抄録

To realize highly integrated micro total analysis systems (μTAS), a simply controlled miniaturized valve should be utilized on microfluidic device. In this paper, we describe the application of photo-induced super-hydrophilicity of titanium dioxide (TiO2) to microfluidic manipulation. In addition, we found a new phenomenon for reversibly converting the surface wettability using a polydimethylsiloxane (PDMS) matrix and the photocatalytic properties of TiO2. While PDMS polymer was irradiated with UV, it was confirmed that hydrophobic material was released from the polymer to air. Several prepolymers were identified as the hydrophobic material with a gas chromatograph and mass spectrometer (GC/MS). Here, we successfully demonstrated the flexible manipulation of microfluid in a branched microchannel using the reversible wettability as micro opto-switching valve (MOS/V). The simultaneous control of MOS/Vs was also demonstrated on a 256-MOS/V integrated disk. The MOS/V promises to be one of the most effective flow switching valves for advanced applications in highly integrated micro/nano fluidics.

本文言語English
ページ(範囲)1968-1973
ページ数6
ジャーナルBiosensors and Bioelectronics
22
9-10
DOI
出版ステータスPublished - 2007 4 15
外部発表はい

ASJC Scopus subject areas

  • バイオテクノロジー
  • 生物理学
  • 生体医工学
  • 電気化学

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