Abstract
Polymer composite nanostructures for selective gas sensors have been designed. It is shown that optical gas sensors have additional possibilities to ensure their selectivity in comparison with electric sensors by comparing changes in optical properties under the action of gases at different wavelengths. The gas-sensitive thin-film polymer nanostructures with the possibility of multiple use due to fast and efficient local heating without additional heaters is presented. The features of changes in optical absorption in combined thin-film polymeric active elements for gas sensors based on a mixture of polyortotoluidine and polyorthoanisidine, which allow to selectively identify the presence of ammonia, hydrogen sulfide and carbon dioxide, have been established. We propose a method of rapid analysis of the spectral sensitivity of optoelectronic sensors on three-channel signal converters with the ability to optimize the spectral characteristics of the active medium, in particular the wavelength with maximum absorption of this medium.
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