Optical Ammonia Sensors Based on Spray-Coated Polyaniline Complexes with Polysulfonic Acids.

ABSTRACT: The optical ammonia-sensing properties of water-dispersible polyaniline (PANI) complexes chemically synthesized in the presence of polysulfonic acids of different structure and chain flexibility were compared for the first time. Flexible-chain poly(styrene-4-sulfonic acid) and poly-(2-acrylamido-2-methyl-1-propanesulfonic acid), as well as semi-rigid-chain poly-4,4'-(2,2'-disulfonic acid)diphenylene-iso-phthalamide and rigid-chain poly-4,4'-(2,2'-disulfonic acid)diphenylene-tere-phthalamide (t-PASA) were used. The sensor films were prepared by a convenient and scalable method-spray coating of aqueous solutions on glass substrates. The optical response time and amplitude of the sensor films in the range of ammonia concentrations from 5 to 200 ppm were investigated. To overcome the influence

SUBMITTER: Gribkova OL 

PROVIDER: S-EPMC12157768 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature