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Загальна кількість знайдених документів : 2
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Strelchuk V. V. Micro-Raman study of nanocomposite porous films with silver nanoparticles prepared using pulsed laser deposition [Електронний ресурс] / V. V. Strelchuk, O. F. Kolomys, B. O. Golichenko, M. I. Boyko, E. B. Kaganovich, I. M. Krishchenko, S. O. Kravchenko, O. S. Lytvyn, E. G. Manoilov, Iu. M. Nasieka // Semiconductor physics, quantum electronics & optoelectronics. - 2015. - Vol. 18, № 1. - С. 46-52. - Режим доступу: http://nbuv.gov.ua/UJRN/MSMW_2015_18_1_10 Nanocomposite porous fdms with silver nanoparticle (Ag NP) arrays were prepared by the pulsed laser deposition from the back flux of erosion torch particles in argon atmosphere on the substrate placed at the target plane. Preparation conditions of the films were set by argon pressure, energy density of laser pulses, their amount and substrate position relatively to the torch axis. The films were prepared with gradient thickness, variable Ag NP sizes and distance between them along the length of substrate as well as corresponding maxima in the spectra of local surface plasmon absorption. Plasmon effects of the Raman scattering enhance in the matter of the Ag NP shell gave the opportunity to register the spectral bands caused by an extremely small quantity of silver compounds with oxygen and carbon. The possible nature of individual bands in the Raman spectrum was analyzed. The obtained results are important for interpretation of the Raman spectra of analytes based on the prepared SERS substrates.
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Golichenko B. O. Raman study of L-Asparagine and L-Glutamine molecules adsorbed on aluminum films in a wide frequency range [Електронний ресурс] / B. O. Golichenko, V. M. Naseka, V. V. Strelchuk, O. F. Kolomys // Semiconductor physics, quantum electronics & optoelectronics. - 2017. - Vol. 20, № 3. - С. 297-304. - Режим доступу: http://nbuv.gov.ua/UJRN/MSMW_2017_20_3_5 Using micro-Raman spectroscopy, a detailed study of vibrational spectra of L-Asparagine and L-Glutamine amino acids adsorbed on aluminum foils were carried out within the frequency range 80 - 3500 cm<^>-1 under different excitation wavelengths. On the basis of detailed analysis of Raman spectra of the mentioned above amino acids and data of DFT-calculations of normal modes and isotopic substitution for these analytes available in literature, interpretation of amino acids vibrational bands were performed. The polarized Raman spectra of studied amino acids indicate different ordering of polycrystalline structure in distinct spots on the sample. The most significant variations of ratios between polarized bands are principally observed for deformation vibrations of NH2, COO<^>- and CH2 groups within entire "fingerprint" range and valence vibrations of CC and CN bonds within the range 1000 - 1100 cm<^>-1.
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