Registration Number
0224U033154,
(0124U003897)
, R & D reports
Title
Specific interactions and control of properties of conducting conjugated polymer nanocomposites for sensing applications.
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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
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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.
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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
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Biletskyi Anton І.
Hreshchuk Oleksandr M.
Davydenko Nataliia V.
Noskov Yurii V.
Ohurtsov Mykola O.
Slobodian Oleksandr M.
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2024-12-19
