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Information × Registration Number 0225U004735, (0124U002059) , R & D reports Title Development of a technique for detecting explosive materials based on the methods of SERS spectroscopy and localized surface plasmon resonance popup.stage_title Синтез наночастинок шляхетних металів (золота, срібла)різної форми/розміру для використання у якості підкладок, та комбінування колоїдних НЧ металу з підкладками, отриманими термічним напиленням, для підсилення дії ефектів НЧ та SERS-підкладок. Аналіз ефективності даних методів на основі отриманих ППРС та ЛППР спектрів Head Mazur Nazar V., Доктор філософії Registration Date 17-12-2025 Organization V. Lashkaryov Institute of Semiconductor Physics of National Academy popup.description1 The purpose of the research work is to develop a technique for detecting low concentrations of explosive substances using two complementary optical methods - localized surface plasmon resonance (LSPR) and surface-enhanced Raman spectroscopy (SERS). Both methods are based on the phenomenon of plasmon resonance, but they provide different information about the analytes. The LSPR method allows very accurate determination of the amount of adsorbed analyte, even if it is present in very small amounts. Raman spectroscopy, on the other hand, can determine the type of compound or even identify a specific molecule, but it is less effective for quantitative analysis of substances. That is why the combination of SERS and LSPR techniques will increase the credibility and reliability of the results of detecting explosive substances. popup.description2 During the reporting period, a number of nanoparticles (NPs) of noble metals (silver, gold) were synthesized using colloidal chemistry methods. The shape and dimensions of these NPs were determined using SEM and dynamic light scattering spectroscopy. From the research data, it was established that the sizes of NPs are 10-100 nm (in some cases, several hundred nm), the shape of nanoparticles is spherical, cubic, anisotropic, in the form of nanoshells, etc. The optical absorption spectra of these NPs were measured, and the positions of plasmon absorption bands were determined, which is important for selecting the resonant excitation wavelength for Raman studies. Analyte molecules in a mixture with synthesized NPs were deposited by various methods on silicon substrates, on which the SERS signals were measured. The wavelength of the exciting laser was selected depending on the position of the plasmon resonance of the NPs (457, 532, 671 nm). Using this technique, it was possible to register Raman scattering bands corresponding to the analytes (with a low concentration from 10-4 to 10-7 M). Also, SERS substrates created from self-organized layers of silicon dioxide nanospheres (SiO2) and synthesized NPs were combined. Using this combination, it was also possible to obtain Raman light scattering spectra from explosive analogs. Product Description popup.authors Isaieva Oksana F. Demydov Petro V. Vitalii K. Lytvyn popup.nrat_date 2025-12-17 Close