TY  - JOUR
AU  - Miyamoto, Ko-ichiro
AU  - Ichimura, Hiroki
AU  - Wagner, Torsten
AU  - Schöning, Michael J.
AU  - Yoshinobu, Tatsuo
TI  - Chemical imaging of the concentration profile of ion diffusion in a microfluidic channel.
JO  - Sensors and actuators  / B
VL  - 189
SN  - 0925-4005
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - FZJ-2014-00645
SP  - 240 - 245
PY  - 2013
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000326346300035
DO  - DOI:10.1016/j.snb.2013.04.057
UR  - https://juser.fz-juelich.de/record/150596
ER  -