Chemical imaging of the concentration profile of ion diffusion in a microfluidic channel

Ko Ichiro Miyamoto, Hiroki Ichimura, Torsten Wagner, Michael J. Schöning, Tatsuo Yoshinobu

研究成果: Article査読

25 被引用数 (Scopus)

抄録

The chemical imaging sensor is a device to visualize the spatial distribution of chemical species based on the principle of LAPS (light-addressable potentiometric sensor), which is a field-effect chemical sensor based on semiconductor. In this study, the chemical imaging sensor has been applied to investigate the ion profile of laminar flows in a microfluidic channel. The chemical images (pH maps) were collected in a Y-shaped microfluidic channel while injecting HCl and NaCl solutions into two branches. From the chemical images, it was clearly observed that the injected solutions formed laminar flows in the channel. In addition, ion diffusion across the laminar flows was observed, and the diffusion coefficient could be derived by fitting the pH profiles to the Fick's equation.

本文言語English
ページ(範囲)240-245
ページ数6
ジャーナルSensors and Actuators, B: Chemical
189
DOI
出版ステータスPublished - 2013

ASJC Scopus subject areas

  • 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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