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Review of Microfluidic Devices for On‐Chip Chemical Sensing
Author(s) -
WATANABE TAKAHIRO,
SASSA FUMIHIRO,
YOSHIZUMI YOSHITAKA,
SUZUKI HIROAKI
Publication year - 2017
Publication title -
electronics and communications in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.131
H-Index - 13
eISSN - 1942-9541
pISSN - 1942-9533
DOI - 10.1002/ecj.11944
Subject(s) - microfluidics , wetting , surface tension , capillary action , mixing (physics) , materials science , flow (mathematics) , channel (broadcasting) , chip , lab on a chip , nanotechnology , electrode , computer science , chemistry , mechanics , telecommunications , composite material , quantum mechanics , physics
SUMMARY Microfluidic techniques can be a basis to realize user‐friendly microanalytical devices of high performance. Required operations include injection of solutions to reaction chambers, volume measurement, and mixing of solutions. For this purpose, the use of surface tension is attractive. In hydrophobic flow channels, solutions can be moved stably in the form of plugs. Otherwise, solutions can be transported by capillary action in a hydrophilic flow channel and stopped at a hydrophobic valve. The valve can be opened autonomously by switching the mixed potential by wetting a zinc electrode formed in a controlling flow channel. In this review paper, we introduce some of our microfluidic devices particularly focusing on devices that work based on surface tension.