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A multi‐well‐structured light‐addressable potentiometric sensor (LAPS) plate is developed for measuring a plurality of sample solutions on a single sensor plate. It is also capable of high‐resolution chemical imaging inside the well structure. It can be applied, for example, to quantification of metabolic activities and imaging of biological samples incubated in the well structure. A minimum pattern...
The measurement system of a chemical imaging sensor is combined with the circuitry for polarization of a metal test piece. The surface of the metal test piece is brought into contact with the sensor surface forming a crevice of about 12 µm width. The course of initiation and propagation of corrosion are observed as serial images of pH in the crevice. A local change of the pH value down to 2 is observed...
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