Optical sensors for ammonia detection based on multilayer biopolymer coatings with immobilized pH dye

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Authors: Voznesenskiy S. S., Sergeev A. A., Mironenko A. Yu., Bratskaya S. Yu., Nepomnyaschiy A. V.

Annotation: Optical and sensor properties of chitosan/ carrageenan multilayer of biopolymer coatings with immobilized pH dye were investigated. The features of highly sensitive optical waveguide sensor for ammonia based on these coatings are shown.

Keywords: integrated optic ammonia sensor, ph-indicator, evanescent-field sensor, natural polymers