This title appears in the Scientific Report :
2013
Please use the identifier:
http://dx.doi.org/10.1016/j.snb.2013.03.016 in citations.
High-speed chemical imaging system based on front-side-illuminated LAPS
High-speed chemical imaging system based on front-side-illuminated LAPS
The chemical imaging sensor is a semiconductor-based chemical sensor that can visualize the spatial distribution of specific ions on the sensing surface. The conventional chemical imaging system based on the light-addressable potentiometric sensor (LAPS), however, required a long time to obtain a ch...
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Personal Name(s): | Itabashi, Akinori |
---|---|
Kosakab, Naoki / Miyamotoa, Ko-ichiro (Corresponding author) / Wagner, Torsten / Yoshinobua, Tatsuo / Schöning, Michael J. | |
Contributing Institute: |
Bioelektronik; PGI-8 Bioelektronik; ICS-8 JARA-FIT; JARA-FIT |
Published in: |
Sensors and actuators |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2013
|
DOI: |
10.1016/j.snb.2013.03.016 |
Document Type: |
Journal Article |
Research Program: |
Physics of the Cell Sensorics and bioinspired systems |
Publikationsportal JuSER |
The chemical imaging sensor is a semiconductor-based chemical sensor that can visualize the spatial
distribution of specific ions on the sensing surface. The conventional chemical imaging system based on
the light-addressable potentiometric sensor (LAPS), however, required a long time to obtain a chemical
image, due to the slow mechanical scan of a single light beam. For high-speed imaging, a plurality
of light beams modulated at different frequencies can be employed to measure the ion concentrations
simultaneously at different locations on the sensor plate by frequency division multiplex (FDM). However,
the conventional measurement geometry of back-side illumination limited the bandwidth of the
modulation frequency required for FDM measurement, because of the low-pass filtering characteristics
of carrier diffusion in the Si substrate. In this study, a high-speed chemical imaging system based on
front-side-illuminated LAPS was developed, which achieved high-speed spatiotemporal recording of pH
change at a rate of 70 frames per second.
© 2013 Elsevier B.V. All rights reserved. |