7.2.5 High-speed Chemical Imaging System Based on Front-side-illuminated LAPS

Akinori Itabashi, Naoki Kosaka, Ko-Ichiro Miyamoto, Torsten Wagner & Tatsuo Yoshinobu
The chemical imaging sensor is a Si-based chemical sensor that visualizes the spatial distribution of a specific ion in the solution contacted with the sensing surface. It is based on the principle of the lightaddressable potentiometric sensor (LAPS), in which a modulated light beam is used to read out the ion concentration in the form of photocurrent. Since the conventional chemical imaging sensor uses a scanning light beam for mapping the distribution of the ion...