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Information × Registration Number 0226U003472, (0124U002270) , R & D reports Title Research on composite active media for smart optical gas sensors. popup.stage_title Дослідження фізико-хімічних властивостей активних елементів оптичних сенсорів газу у різних газових середовищах. Head Tsizh Bohdan R., д.т.н. Registration Date 08-04-2026 Organization Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies Lviv popup.description1 Research on methods of obtaining active media for smart optical gas sensors with improved operational parameters. popup.description2 The change in the optical properties of composite active elements of optical gas sensors under the action of various gases was studied. In particular, the gas sensitivity of newly synthesized sensor elements was doubled by increasing the surface area of adsorption of analytes of polymer condensates. The sensitivity and selectivity of optical gas sensors based on the studied nanostructured polymer active elements were increased by using the method of analyzing the useful signal at a selected wavelength. The time range of gas-stimulated changes in the optical absorption of active sensor elements was reduced by two or more times. The degree of recovery of the optical absorption of polymer layers was increased to 85 % and more compared to the initial values, and, thus, the reversibility of sensors based on them was significantly improved. According to the results of morphological studies of the thin gas-sensitive layers synthesized by us, it was established that nanostructured polyaniline condensates have a heterogeneous amorphous-crystalline surface with polycrystalline inclusions with grain sizes of the order of 20–40 nm. Such features of changes in optical absorption under the action of gas can be successfully used in the manufacture of active elements of optical gas sensors, primarily fast-acting ones, for express analyses, since they will have higher values of speed, sensitivity, selectivity. For better reversibility of such sensors, as well as reducing their recovery time and energy consumption, an active element design is proposed, which provides for the possibility of effective rapid recovery of the properties of the polymer gas-sensitive layer by local heating of the control zone. This allows for a significant increase in the efficiency of restoring the optical properties of the active element of the gas sensor, improves its reversibility, and expands its functionality. Product Description popup.authors Mariia I. Chokhan Olena I. Aksimentieva Anatolii O. Fedortsuk Yuliia Y. Horbenko Yurii Y. Varyvoda Stepan A. Kutsii Volodymyr I. Kyryliv Zoriana A. Huta Mar'iana R. Dzeryn Mariia I. Hirkova Zenovii V. Kolishytskyi popup.nrat_date 2026-04-08 Close