High-speed chemical imaging inside a microfluidic channel

Ko Ichiro Miyamoto; Akinori Itabashi; Torsten Wagner; Michael J. Schöning; Tatsuo Yoshinobu

doi:10.1016/j.snb.2013.12.090

High-speed chemical imaging inside a microfluidic channel

Ko Ichiro Miyamoto, Akinori Itabashi, Torsten Wagner, Michael J. Schöning, Tatsuo Yoshinobu

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

In this study, a high-speed chemical imaging system was developed for visualization of the interior of a microfluidic channel. A microfluidic channel was constructed on the sensor surface of the light-addressable potentiometric sensor (LAPS), on which the ion concentrations could be measured in parallel at up to 64 points illuminated by optical fibers. The temporal change of pH distribution inside the microfluidic channel was recorded at a maximum rate of 100 frames per second (fps). The high frame rate allowed visualization of moving interfaces and plugs in the channel even at a flow velocity of 111 mm/s, which suggests the feasibility of plug-based microfluidic devices for flow-injection analysis (FIA).

Original language	English
Pages (from-to)	521-527
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	194
DOIs	https://doi.org/10.1016/j.snb.2013.12.090
Publication status	Published - 2014 Apr 1

Keywords

High-speed chemical imaging
Light-addressable potentiometric sensor
Microfluidic channel

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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AU - Itabashi, Akinori

AU - Wagner, Torsten

AU - Schöning, Michael J.

AU - Yoshinobu, Tatsuo

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