Chemical imaging of the concentration profile of ion diffusion in a microfluidic channel
- 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.
| Author: | Ko-ichiro Miyamoto, Hiroki Ichimura, Torsten WagnerORCiD, Michael Josef SchöningORCiD, Tatsuo Yoshinobu |
|---|---|
| DOI: | https://doi.org/10.1016/j.snb.2013.04.057 |
| ISSN: | 1873-3077 (E-Journal); 0925-4005 (Print) |
| Parent Title (English): | Sensors and actuators. B: Chemical |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Year of Completion: | 2013 |
| Date of the Publication (Server): | 2013/08/14 |
| Volume: | 189 |
| First Page: | 240 |
| Last Page: | 245 |
| Note: | Part of special issue "Selected Papers from the 26th European Conference on Solid-State Transducers" |
| Link: | https://doi.org/10.1016/j.snb.2013.04.057 |
| Zugriffsart: | campus |
| Institutes: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
| FH Aachen / INB - Institut für Nano- und Biotechnologien | |
| collections: | Verlag / Elsevier |
