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Device simulation of the light-addressable potentiometric sensor with a novel photoexcitation method for a higher spatial resolution
- A novel photoexcitation method for the light-addressable potentiometric sensor (LAPS) realized a higher spatial resolution of chemical imaging. In this method, a modulated light probe, which generates the alternating photocurrent signal, is surrounded by a ring of constant light, which suppresses the lateral diffusion of photocarriers by enhancing recombination. A device simulation verified that a higher spatial resolution could be obtained by adjusting the gap between the modulated and constant light. It was also found that a higher intensity and a longer wavelength of constant light was more effective. However, there exists a tradeoff between the spatial resolution and the amplitude of the photocurrent, and thus, the signal-to-noise ratio. A tilted incidence of constant light was applied, which could achieve even higher resolution with a smaller loss of photocurrent.
| Author: | Yuanyuan Guo, Kosuke Seki, Ko-ichiro Miyamoto, Torsten WagnerORCiD, Michael Josef SchöningORCiD, Tatsuo Yoshinobu |
|---|---|
| DOI: | https://doi.org/10.1016/j.proeng.2014.11.369 |
| ISSN: | 1877-7058 |
| Parent Title (English): | Procedia Engineering |
| Publisher: | Elsevier |
| Place of publication: | Amsterdam |
| Document Type: | Article |
| Language: | English |
| Year of Completion: | 2014 |
| Date of the Publication (Server): | 2015/01/09 |
| Tag: | Light-addressable Potentiometric Sensor; novel photoexcitation method; spatial resolution; tilted constant illumination |
| Volume: | 87 |
| First Page: | 456 |
| Last Page: | 459 |
| Note: | EUROSENSORS 2014 ; European Conference on Solid-State Transducers <28, 2014> |
| Link: | https://doi.org/10.1016/j.proeng.2014.11.369 |
| Zugriffsart: | weltweit |
| Institutes: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
| collections: | Verlag / Elsevier |
| Open Access / Gold | |
| Licence (German): |  Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung |
