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 |
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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 |
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 |