Novel photoexcitation method for light-addressable potentiometric sensor with higher spatial resolution
- A novel photoexcitation method for the light-addressable potentiometric sensor (LAPS) is proposed to achieve a higher spatial resolution of chemical images. The proposed method employs a combined light source that consists of a modulated light probe, which generates the alternating photocurrent signal, and a ring of constant illumination surrounding it. The constant illumination generates a sheath of carriers with increased concentration which suppresses the spread of photocarriers by enhanced recombination. A device simulation was carried out to verify the effect of constant illumination on the spatial resolution, which demonstrated that a higher spatial resolution can be obtained.
| Author: | Yuanyuan Guo, Kosuke Seki, Ko-ichiro Miyamoto, Torsten WagnerORCiD, Michael Josef SchöningORCiD, Tatsuo Yoshinobu |
|---|---|
| DOI: | https://doi.org/10.7567/APEX.7.067301 |
| ISSN: | 1882-0786 (E-Journa); 1882-0778 (Print) |
| Parent Title (English): | Applied physics express : APEX |
| Publisher: | IOP |
| Place of publication: | Bristol |
| Document Type: | Article |
| Language: | English |
| Year of Completion: | 2014 |
| Date of the Publication (Server): | 2014/05/27 |
| Volume: | 7 |
| Issue: | 6 |
| First Page: | 067301-4 |
| Link: | https://doi.org/10.7567/APEX.7.067301 |
| Zugriffsart: | bezahl |
| Institutes: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
| FH Aachen / INB - Institut für Nano- und Biotechnologien | |
| collections: | Verlag / IOP |
