Наукові публікації кафедри загальної та прикладної фізики

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Browsing Наукові публікації кафедри загальної та прикладної фізики by Subject "cobalt alkanoate"

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    Conductivity of composites of thermotropic ionic liquid crystals
    (Electronics and Control Systems 2015. N 2(44): 29-32, 2015) Gridyakina, Alexandra
    This work presents the studies of the transport properties of samples of oriented binary composite of cobalt decanoate with lead decanoate. Found that samples of the mixture at the temperature range of liquid crystal existence are weak electrolytes, which have anisotropy of bulk conductivity caused by the ordering of molecules. The values of mobility and charge concentration were estimated.
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    Conductivity of thermotropic ionic liquid crystals
    (Proceedings of the National Aviation University. 2015. N 3(64): 64–68, 2015) Gridyakina, Alexandra
    The article represents the results of electrical conductivity studies of cobalt decanoate and lead decanoate oriented samples. It was determined that samples are weak electrolytes in the liquid crystal state region. The samples are characterized by great anisotropy of bulk conductivity caused by molecular order.
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    Electric properties of ionic thermotropic liquid crystals
    (Український фізичний журнал., 2016. Т. 61, № 6, 2016) Gridyakina, Alexandra
    This work presents the results of studies of the electric properties of samples of oriented ionic thermotropic liquid crystals (ITLC) of cobalt decanoate, lead decanoate, and their binary mixture. It is found that all studied samples in the temperature range, where a liquid crystal exists, are weak electrolytes. All investigated compounds are characterized by an anisotropy of bulk conductivity caused by the ordering of molecules. The values of electric conductivity, activation energy, charge mobility, and concentration are estimated.
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    Nonlinear Optical Response of Smectic Glasses Based on Cobalt Alkanoates
    (Український фізичний журнал, 2012) Gridyakina, Alexandra; Polishchuk, Arkadiy
    The nonlinear-optical response of anisotropic smectic glasses based on cobalt-alkanoates is studied using the method of dynamic holography. Laser-induced dynamic gratings under the action of nanosecond laser pulses are observed and analyzed for such materials. It is found that a cubic optical nonlinearity of all studied anisotropic glasses is of electronic origin in the nanosecond diapason and caused by a nonlinear polarization of cobalt-alkanoates complexes.
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    Novel Nanocomposite Materials Based on Mesomorphic Glasses of Metal Alkanoates: Structure and Nonlinear Optical Properties
    (High Energy Chemistry, 2009, Vol. 43, No. 7, pp. 532–535, 2009) Gridyakina, Alexandra; Polishchuk, Arkadiy
    Novel nanocomposite materials based on an ordered mesomorphic glass of metal alkanoates have been proposed for fast transfer and processing of optical information. Metal alkanoate salts when heated form a smectic mesophase which can be easily supercooled forming an ordered mesomorphic glass at room temperature. The glass has the structure of the smectic-A phase: electrostatic cation–anion layers alternate with bilayers of alkane chains. The mesomorphic glass is a universal matrix for organic and inorganic nanoinclusions and nanosized crystals. In this paper, the structure of the cells of the mesomorphic glasses with various inclusions and their nonlinear optical properties, which become evident upon the impact of pulsed laser radiation with an intensity of up to 5.5 MW/cm2, have been investigated.