Lateral resolution enhancement of pulse-driven light-addressable potentiometric sensor
- To study chemical and biological processes, spatially resolved determination of the concentrations of one or more analyte species is of distinct interest. With a light-addressable potentiometric sensor (LAPS), chemical images can be created, which visualize the concentration distribution above the sensor plate. One important challenge is to achieve a good lateral resolution in order to detect events that take place in a small and limited region. LAPS utilizes a focused light spot to address the measurement region. By moving this light spot along the semiconductor sensor plate, the concentration distribution can be observed. In this study, we show that utilizing a pulse as light excitation instead of a traditionally used continuously modulated light excitation, the lateral resolution can be improved by a factor of 6 or more.
| Author: | Frederik WernerORCiD, Ko-ichiro Miyamoto, Torsten WagnerORCiD, Michael Josef SchöningORCiD, Tatsuo Yoshinobu |
|---|---|
| DOI: | https://doi.org/10.1016/j.snb.2017.02.057 |
| ISSN: | 0925-4005 |
| Parent Title (English): | Sensor and Actuators B: Chemical |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Year of Completion: | 2017 |
| Date of the Publication (Server): | 2017/08/21 |
| Tag: | Chemical images; LAPS; Light-addressable potentiometric sensor |
| Volume: | 248 |
| First Page: | 961 |
| Last Page: | 965 |
| Link: | https://doi.org/10.1016/j.snb.2017.02.057 |
| Zugriffsart: | campus |
| Institutes: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
| FH Aachen / INB - Institut für Nano- und Biotechnologien | |
| collections: | Verlag / Elsevier |
