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Information × Registration Number 0224U033154, (0124U003897) , R & D reports Title Specific interactions and control of properties of conducting conjugated polymer nanocomposites for sensing applications. popup.stage_title Розробка, дослідження властивостей та скринінг нових сенсорних нанокомпозитів ЕПП, їх дисперсій для формування сенсорних шарів на електродах для реєстрації токсичних летких сполук. Head Pud Oleksandr A., д.х.н. Registration Date 19-12-2024 Organization V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry of the National Academy of Sciences of Ukraine popup.description1 Development of new highly sensitive sensibilized sensor nanocomposites of conductive polymers for determining low concentrations of toxic volatile compounds in the surrounding atmosphere based on finding ways to control their sensor properties. The main goals of the 2024 stage are: to develop chemical syntheses, to prepare and to form dispersions of new sensory nanocomposites doped with conducting polymers (at least 15). To carry out a preliminary assessment of their sensory, spectral and electrophysical properties, structure, morphology, stability and their dependence on the conditions of synthesis, dispersion and the use of sensitizing additives. popup.description2  New hybrid sensor nanocomposites based on doped intrinsically conducting polymers (ICPs) namely polyaniline, polypyrrole and poly(3-methylthiophene) synthesized as shells on the surface of nanoparticles of different nature and morphology, as well as with various sensitizing additives, were developed. Dispersions of the obtained nanocomposites with and without sensitizing additives were developed for applying their layers on the surface of comb-shaped electrodes to record their sensory responses to volatile compounds vapors. The molecular structure, doping, and composition of the new nanocomposites were studied by FT-IR and Raman spectroscopy. The presence of specific interactions between ECPs, filler nanoparticles, and sensitizing additives was shown. The TEM method showed that the most of synthesized nanocomposites have core-shell morphology. It was shown that in the case of nanocomposites of carbon nanotubes (CNTs) and pure CNTs as a result of ultrasonic treatment, the length of individual nanotubes decreases. It was established that the thermal stability of the synthesized nanocomposites nonlinearly depends on the ICPs content in the nanocomposite and varies with the change in the nature of the components and dopant. The electrophysical properties of the synthesized EPP nanocomposites with CNTs and the influence of the ultrasonic dispersion conditions and sensitizing additives on them were studied by measuring their electrical conductivity, the type of conductivity and the concentration of charge carriers were determined using the Hall effect, measuring the current-voltage characteristics of heterostructures of the CNT/EPP/p-Si type and their Mott-Schottky analysis. In particular, it was found that all samples showed n-type (electronic) conductivity. Preliminary evaluation of the sensor characteristics of the new nanocomposites showed a significant improvement in their efficiency in the presence of sensitizing additives. Product Description popup.authors Biletskyi Anton І. Hreshchuk Oleksandr M. Davydenko Nataliia V. Noskov Yurii V. Ohurtsov Mykola O. Slobodian Oleksandr M. popup.nrat_date 2024-12-19 Close