L. A. Shcherbachenko

Irkutsk State University, Irkutsk, Irkutskaya Oblast', Russia

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Publications (6)3.54 Total impact

  • Article: Analysis of the structural interaction of electrically active heterogeneous finely dispersed systems at the interfaces between the solid and liquid phases
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    ABSTRACT: Strong electrical forces have been revealed in electrically active heterogeneous finely dispersed systems at the interfaces between the solid and liquid phases. It has been established that these forces give rise to gradients of the potential of an internal self-electric field that can provide circulation of electric currents in the systems under investigation. It has been found that, in these systems, there arises a double electric layer that represents a new structuring phase, which is characteristic of electrically active systems only. The mechanism of formation of a double electric layer includes electrocontact interaction between the surfaces of two heterogeneous liquid and solid polar dielectrics.
    Physics of the Solid State 05/2012; 53(7):1492-1498. · 0.71 Impact Factor
  • Article: Specific features of the dielectric response of heterogeneous systems with a polar matrix containing electrically active inclusions
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    ABSTRACT: A theoretical model has been proposed which makes it possible to introduce the correction into the complex permittivity of electrically active condensed systems that contain a polar liquid matrix and low-dimensional solid particles with a developed electrically active surface. It has been established that there is an interfacial electrical interaction between surface charges of the solid component and polar molecules of the liquid matrix. The processes occurring during this interaction lead to the appearance of an intrinsic internal electric field in the system under investigation. The contribution from surface effects to the formation of the polarized state of the polar liquid medium has been investigated in terms of the proposed model. The possibility of controlling the processes of local change in the structure of the polar liquid component under the effect of the internal electric field by varying the electrically active specific surface area of the solid phase and the intrinsic dipole moment of molecules of the liquid matrix has been analyzed in the studied systems. The conditions providing for the appearance of a controlled potential gradient of the internal electric field have been determined for the dispersed systems under consideration. The parameter that makes it possible to evaluate the contribution from the interfacial electrical contact interaction to the dielectric response of the liquid component and the entire system has been introduced for the first time.
    Physics of the Solid State 04/2012; 53(1):53-58. · 0.71 Impact Factor
  • Article: Electret-thermal and dielectric analyses of electrically active colloids
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    ABSTRACT: The nature and mechanism of interfacial electrical interaction in organic colloids containing an active solid phase and a polar liquid phase are studied. Such systems are shown to offer specific properties. Specifically, high electrical forces producing gradients of the potential of the self-electric internal field arise at the liquid-solid interface. In the presence of free charges and ionic conductivity channels, this field can induce currents in such systems. When investigating the colloid system of the human venous blood, it is found that the internal field causes mesoscopic inhomogeneity in the structure of the aqueous components of the plasma and cytoplasm. It is shown that the concentration of free water molecules in the liquid phase of the system is maximal in group I blood and the physically nonuniform properties of combined water show up to the greatest extent in group IV blood. This finding is corroborated by the dispersion of the dielectric polarization in blood of different groups.
    Technical Physics 04/2012; 55(8):1209-1215. · 0.50 Impact Factor
  • Article: Electret effect in heterogeneous systems comprising low-dimensional particles with electrically active surface
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    ABSTRACT: Experimental and theoretical investigations of the electret effect in low-dimensional micas with different degrees of dispersion and adsorption are carried out at temperatures in the range 20–140°C. The results obtained allow the electric activity of the mica particles comprised in these systems to be determined and the efficiency of application of low-dimensional micas for fillers of composite materials to be estimated. Keywordselectret effect-thermally stimulated spectroscopy-interphase interaction-internal field-bound water
    Russian Physics Journal 04/2012; 53(5):493-498. · 0.41 Impact Factor
  • Article: Electret effect and electrotransport in disperse organic and inorganic systems
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    ABSTRACT: The electret properties and electrotransport of venous human blood of various groups and a disperse system based on fine-grained mica are studied. General laws are revealed in the thermally stimulated current spectra of these inorganic and organic systems. The nature of the current peaks and their relation to the physicochemical transformations and the interphase interactions in these systems are discussed. A set of numerical parameters is obtained to describe the electrophysical state of the biological system; it can be used to diagnose the functional and biochemical states of this system.
    Technical Physics 04/2012; 54(9):1372-1379. · 0.50 Impact Factor
  • Article: Anomalous properties of absorbed water films in layered silicates
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    ABSTRACT: The electrical properties of water films in residual electric fields on the surface of crystals and in slitlike capillaries of layered silicates are investigated. The results obtained indicate a substantial change in the water structure, degradation of the dipole-orientation polarization of molecules, and a decrease in the crystallization temperature.
    Physics of the Solid State 10/2006; 48(11):2065-2068. · 0.71 Impact Factor