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Light-addressable chemical sensors: Modelling and computer simulations

✍ Scribed by Giuseppe Massobrio; Sergio Martinoia; Massimo Grattarola

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
340 KB
Volume
7
Category
Article
ISSN
0925-4005

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✦ Synopsis

A light-addressable potentiometric sensor (LAPS) has recently been proposed as a pH sensor. A LAPS description is presented that is suitable for direct applications as a built-in model in circuit-simulation programs, such as SPICE. The model equations describing the LAPS behaviour have been formulated by modelling the electrolyte-insulator interface via site-binding theory, and by modelling, via semiconductor 'theory, the insulator-semiconductor structure under the photogeneration effects induced by an externally addressed light. Simulation results are presented, focused on the analysis of the detection of transient acidification phenomena.

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