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Information × Registration Number 0224U031745, 0122U002023 , R & D reports Title Optical and electrochemical sensors based on nanomaterials, supramolecular systems for on-site and in vitro analysis popup.stage_title Head Tananaiko Oksana Yu., Доктор хімічних наук Registration Date 10-06-2024 Organization Taras Shevchenko National University of Kyiv popup.description2 The influence of various factors on the efficiency of an electrochemical sensor based on carbon nanomaterials (С-NP), immobilized hydrogenase from the hyperthermophilic bacterium Aquifex aeolicus for the quantitative determination of hydrogen was investigated. The sensitivity is 4 μA cm−2 per % H2, the linearity of the analytical signal is 1–20 %. Thin films of silica were obtained by the sol-gel method and applied to the surface of the electrodes. They are promising platforms for the development of electrochemical biosensors. A sensitive element of a biosensor based on copper(II) oxide and glucose oxidase was obtained for evaluating the metabolic activity of microorganisms based on their glucose consumption, toxicity, and the minimum inhibitory concentration of the toxicant. Gold nanoparticles were synthesized by bioreduction of НAuCl4 and characterized by spectroscopic methods. They are promising for use in electrochemical enzyme sensors, surface plasmon resonance sensors, and in biomedicine. A hybrid nanopowder based on silicon and carbon nanoparticles (Si-С_NP) was obtained. The chemical composition of the surface was characterized (carboxyl, lactone and phenolic groups were found). A sandwich structure (Pd–NP–Si-С_NP) was created to determine the concentration of H2 in N2 with satisfactory response stability due to the specific structure of the sensitive layer. The nature of the changes in the absorption and fluorescence spectra indicates the formation of complexes of 7-hydroxycoumarins with metals (Zn, Cd). The change in luminescence intensity depends on the presence of a methoxyphenyl substituent in the 6-pyrazolyl-7-hydroxycoumarin molecule. The reagent system Mo(VI)–brompyrogallol red was modified by surfactant. The spectrophotometric and fluorescence characteristics of this system are suitable for the detection of decamethoxine in medicinal products and protein in urine. Product Description popup.authors Alekseiev Serhii О. Zamotaev Oleksandr M. Klovak Viktoriia О. Lisniak Vladyslav V. Lynnyk Rostyslav P. Mykhailiuk Pavlo K. Trokhymenko Оlha М. popup.nrat_date 2024-06-10 Close