%0 Journal Article
%A Itabashi, Akinori
%A Kosakab, Naoki
%A Miyamotoa, Ko-ichiro
%A Wagner, Torsten
%A Yoshinobua, Tatsuo
%A Schöning, Michael J.
%T High-speed chemical imaging system based on front-side-illuminated LAPS
%J Sensors and actuators  / B
%V B 182
%@ 0925-4005
%C Amsterdam [u.a.]
%I Elsevier Science
%M FZJ-2014-00277
%P 315-321
%D 2013
%X The chemical imaging sensor is a semiconductor-based chemical sensor that can visualize the spatial
%X distribution of specific ions on the sensing surface. The conventional chemical imaging system based on
%X the light-addressable potentiometric sensor (LAPS), however, required a long time to obtain a chemical
%X image, due to the slow mechanical scan of a single light beam. For high-speed imaging, a plurality
%X of light beams modulated at different frequencies can be employed to measure the ion concentrations
%X simultaneously at different locations on the sensor plate by frequency division multiplex (FDM). However,
%X the conventional measurement geometry of back-side illumination limited the bandwidth of the
%X modulation frequency required for FDM measurement, because of the low-pass filtering characteristics
%X of carrier diffusion in the Si substrate. In this study, a high-speed chemical imaging system based on
%X front-side-illuminated LAPS was developed, which achieved high-speed spatiotemporal recording of pH
%X change at a rate of 70 frames per second.
%X © 2013 Elsevier B.V. All rights reserved.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000319488800043
%R 10.1016/j.snb.2013.03.016
%U https://juser.fz-juelich.de/record/150198