Light-addressable potentiometric sensor as a sensing element in plug-based microfluidic devices

Ko Ichiro Miyamoto, Takuya Sato, Minami Abe, Torsten Wagner, Michael J. Schöning, Tatsuo Yoshinobu

研究成果: Article査読

11 被引用数 (Scopus)


A plug-based microfluidic system based on the principle of the light-addressable potentiometric sensor (LAPS) is proposed. The LAPS is a semiconductor-based chemical sensor, which has a free addressability of the measurement point on the sensing surface. By combining a microfluidic device and LAPS, ion sensing can be performed anywhere inside the microfluidic channel. In this study, the sample solution to be measured was introduced into the channel in a form of a plug with a volume in the range of microliters. Taking advantage of the light-addressability, the position of the plug could be monitored and pneumatically controlled. With the developed system, the pH value of a plug with a volume down to 400 nL could be measured. As an example of plug-based operation, two plugs were merged in the channel, and the pH change was detected by differential measurement.

出版ステータスPublished - 2016 7 1

ASJC Scopus subject areas

  • 制御およびシステム工学
  • 機械工学
  • 電子工学および電気工学


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