Enhancement of the spatial resolution of the chemical imaging sensor by a hybrid fiber-optic illumination
- The chemical imaging sensor, which is based on the principle of the light-addressable potentiometric sensor (LAPS), is a powerful tool to visualize the spatial distribution of chemical species on the sensor surface. The spatial resolution of this sensor depends on the diffusion of photocarriers excited by a modulated light. In this study, a novel hybrid fiber-optic illumination was developed to enhance the spatial resolution. It consists of a modulated light probe to generate a photocurrent signal and a ring of constant light, which suppresses the lateral diffusion of minority carriers excited by the modulated light. It is demonstrated that the spatial resolution was improved from 92 μm to 68 μm.
| Author: | K. Miyamoto, K. Seki, Torsten WagnerORCiD, Michael Josef SchöningORCiD, T. Yoshinobu |
|---|---|
| DOI: | https://doi.org/10.1016/j.proeng.2014.11.563 |
| 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 |
| Volume: | 87 |
| First Page: | 612 |
| Last Page: | 615 |
| Note: | EUROSENSORS 2014 ; European Conference on Solid-State Transducers <28, 2014> |
| Link: | https://doi.org/10.1016/j.proeng.2014.11.563 |
| Zugriffsart: | weltweit |
| Institutes: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
| FH Aachen / INB - Institut für Nano- und Biotechnologien | |
| collections: | Verlag / Elsevier |
| Open Access / Gold | |
| Licence (German): |  Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung |
