http://dspace.nbuv.gov.ua:80/handle/123456789/114579 2026-04-05T23:02:45Z http://dspace.nbuv.gov.ua:80/handle/123456789/118882 Dielectric properties of nematic liquid crystals with Fe₃O₄ nanoparticles in direct magnetic field Gornitska, O.P.; Koval’chuk, A.V.; Koval’chuk, T.N.; Kopčanský, P.; Timko, M.; Zavisova, V.; Koneracká, M.; Tomašovičová, N.; Jadzyn, J.; Studenyak, I.P. Researched within the frequency range 10⁻¹–10⁶ Hz were dielectric properties of pure 6CHBT liquid crystals and 6CHBT ones with the impurity of Fe₃O₄ nanoparticles that have the mean diameter 5 nm and weight concentration 10⁻⁴ %. The study was performed without and under the influence of direct magnetic field with the induction 0.45 and 0.60 T. It has been shown that the magnetic field influences on the parameters of the near-electrode area of liquid crystal. In the case of liquid crystal with magnetic nanoparticles, the parameter changes caused by the magnetic field depend on the induction value. 2009-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/118881 Parameters of the energy spectrum for holes in CuInSe₂ Gorley, P.М.; Prokopenko, I.V.; Galochkinа, О.О.; Horley, P.P.; Vorobiev, Yu.V.; González-Hernández, J. This paper reports the coefficients Ca,b for the k-linear term in dispersion relation E(k) for holes of the upper valence bands Г⁻₆ and Г⁺₇ in p-CuInSe₂ crystals. We also obtained the tensor components for the carrier effective masses, in all three valence sub-bands of the model semiconductor. It was shown that the energy spectrum parameters for holes in CuInSe₂ allow successful explanation for the anisotropy of tensor components describing the interband light absorption coefficient and the published data for the temperature variation of the Hall coefficient, total Hall mobility and thermal voltage within the temperature range 100 K ≤ T ≤ 350 K. 2009-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/118880 Optical and photoluminescent properties of Ag/Al₂O₃ nanocomposite films obtained by pulsed laser deposition Manoilov, E.G. The method of pulsed laser deposition in vacuum from forward and backward particle flows from an erosion torch was used to prepare silver films and Ag/Al₂O₃ nanocomposite films. Measured were transmission and time-resolved photoluminescence spectra. The authors studied the influence of conditions for film formation on their optical and photoluminescent properties. For the first time, there observed was luminescence with quantum energy 1.6 eV and relaxation times up to several microseconds. 2009-01-01T00:00:00Z http://dspace.nbuv.gov.ua:80/handle/123456789/118879 Preparation technology and photoluminescence properties of CdTe nanocrystals in colloidal solutions and polymeric matrices Kalytchuk, S.M.; Korbutyak, D.V.; Scherbak, L.P. An analysis of physical mechanisms responsible for the influence of stabilizer type and ambient material on CdTe nanocrystal growth rate and passivation effectiveness of surface dangling bonds has been carried out. The possibility to change properties of nanocrystals by changing the stabilizer type has been shown. 2009-01-01T00:00:00Z