V. N. Poroshin
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View article: Dynamics of charge states at the surface of a ferroelectric nanoparticle in a liquid crystal
Dynamics of charge states at the surface of a ferroelectric nanoparticle in a liquid crystal Open
The liquid crystal with suspended ferroelectric nanoparticles is an interesting object for fundamental research on long-range dipole-dipole interactions. Additionally, it is promising for optical, optoelectronic and electrochemical applica…
View article: Interfacial effects and negative capacitance state in P (VDF-TrFE) films with BaTiO <sub>3</sub> nanoparticles
Interfacial effects and negative capacitance state in P (VDF-TrFE) films with BaTiO <sub>3</sub> nanoparticles Open
We analyze the temperature dependences of the effective dielectric permittivity of P(VDF-TrFE) films with BaTiO3 nanoparticles (with the average size 24 nm). Transition from a weak to a strong nonlinear temperature dependence of the dielec…
View article: Dynamics of charge states at the surface of a ferroelectric nanoparticle in a liquid crystal
Dynamics of charge states at the surface of a ferroelectric nanoparticle in a liquid crystal Open
The liquid crystal with suspended ferroelectric nanoparticles is an interesting object for fundamental research of the long-range dipole-dipole interactions; as well as it is promising for optical, optoelectronic and electrochemical applic…
View article: Ferroelectric nanoparticles in liquid crystals: Role of ionic transport at small nanoparticle concentrations
Ferroelectric nanoparticles in liquid crystals: Role of ionic transport at small nanoparticle concentrations Open
We reveal an apparent influence of ultra-small concentrations (1 wt.% or less) of BaTiO3 nanoparticles (average size of 24 nm) on the current-voltage characteristics and capacitance of dielectric liquid crystal (LC) 5CB. A pure LC cell dem…
View article: The impact of morphological structure and flexo-chemical strains on the electric transport mechanisms in the molybdenum-disulfide-oxide nanoflakes
The impact of morphological structure and flexo-chemical strains on the electric transport mechanisms in the molybdenum-disulfide-oxide nanoflakes Open
Electric conduction mechanisms are studied in the pressed nanoflake powder of the molybdenum-disulfide-oxide (MoSxOy) depending on their content and structure. The MoSxOy nanoflakes were prepared by reaction of (NH4)6Mo7O24 with thiourea i…
View article: Anomalous Behavior of the Dielectric and Pyroelectric Responses of Ferroelectric Fine-Grained Ceramics
Anomalous Behavior of the Dielectric and Pyroelectric Responses of Ferroelectric Fine-Grained Ceramics Open
We revealed the anomalous temperature behavior of the giant dielectric permittivity and unusual frequency dependences of the pyroelectric response of the fine-grained ceramics prepared by the spark plasma sintering of the ferroelectric BaT…
View article: Size-Induced High Electrocaloric Response of Dense Ferroelectric Nanocomposites
Size-Induced High Electrocaloric Response of Dense Ferroelectric Nanocomposites Open
Analytical results obtained within Landau-Ginzburg-Devonshire approach and effective media models, predict that the synergy of size effects and Vegard stresses can significantly enhance the electrocaloric cooling (up to 7 times) of the BaT…
View article: Low-temperature radiation damage studies in single-walled carbon nanotube bundles by hopping conductance
Low-temperature radiation damage studies in single-walled carbon nanotube bundles by hopping conductance Open
The paper shows the results of studying radiation defects in single-walled carbon nanotube bundles at low temperatures. The data were obtained in a unique experiment that inseparably combines 1 MeV electron irradiation at a temperature of …
View article: Quantum-dot-like electrical transport of free-standing reduced graphene oxide paper at liquid helium temperatures
Quantum-dot-like electrical transport of free-standing reduced graphene oxide paper at liquid helium temperatures Open
We present the results of a study of the electrical properties of macroscopic free-standing reduced graphene oxide paper (RGOP) with a 60 % fraction of sp2‑carbons at liquid helium temperatures. Graphene domains form an array of quantum do…
View article: Enhancement of electrical conductivity of hydrazine-reduced graphene oxide under thermal annealing in hydrogen atmosphere
Enhancement of electrical conductivity of hydrazine-reduced graphene oxide under thermal annealing in hydrogen atmosphere Open
The effect of further thermal annealing in a hydrogen atmosphere on the electrical properties of hydrazine-reduced graphene oxide (RGO) was investigated. It was found that heat treatment significantly improves the conductivity of RGO and r…
View article: The hopping Hall effect in reduced graphene oxide
The hopping Hall effect in reduced graphene oxide Open
This paper is the first study of the Hall effect in the Efros-Shklovskii variable range hopping conduction regime in the free-standing reduced graphene oxide paper (RGOP). It was found that the temperature dependence of the Hall mobility i…
View article: Electric transport properties in the 2D-MoS<sub>2</sub>
Electric transport properties in the 2D-MoS<sub>2</sub> Open
The features of electric transport in the powder samples consisting of the\nnanosize 2D-MoS2 flakes with different number of layers have been studied under\nthe conditions of uniaxial pressure. There have been measured current-voltage\ncha…
View article: Вивчення впливу вуглецевих нанотрубок на електричну провідність тернарного нанокомпозита ПВДФ/ПАНІ/ МСВНТ при низьких температурах
Вивчення впливу вуглецевих нанотрубок на електричну провідність тернарного нанокомпозита ПВДФ/ПАНІ/ МСВНТ при низьких температурах Open
У данiй роботi представлено результати дослiдження електричних властивостей плiвок нових тернарних нанокомпозитiв дiелектричного полiмеру полiвiнiлiденфториду (ПВДФ), провiдного полiмеру полiанiлiну, допованого додецилбензолсульфоновою кис…
View article: Resistive switching effect in the <i>n</i>-InGaAs/GaAs heterostructures with double tunnel-coupled quantum wells
Resistive switching effect in the <i>n</i>-InGaAs/GaAs heterostructures with double tunnel-coupled quantum wells Open
The electric conductivity behavior in the single and double tunnel-coupled quantum wells (QW) with different doping profile caused by the impact of short pulses of the strong longitudinal (in the quantum wells plane) electric field has bee…
View article: Current and electroluminescence intensity oscillations under bipolar lateral electric transport in the double-GaAs/InGaAs/GaAs quantum wells
Current and electroluminescence intensity oscillations under bipolar lateral electric transport in the double-GaAs/InGaAs/GaAs quantum wells Open
The lateral bipolar electric transport has been investigated for multi-period n-In 0.08 Ga 0.92 As/GaAs heterostructures with tunnel-coupled double-quantum wells for various carrier mobilities at temperatures 4.2...160 K. The presence of t…
View article: A peculiarity of quantum hot-electron real space transfer in dual-channel GaAs-based heterostructures
A peculiarity of quantum hot-electron real space transfer in dual-channel GaAs-based heterostructures Open
The model has been proposed for calculation of the electron transport via the double conducting channels formed in heterostructures with the tunnel-coupled quantum wells with the essentially different mobility of electrons. Experiments to …
View article: Interaction of surface plasmon polaritons in heavily doped GaN microstructures with terahertz radiation
Interaction of surface plasmon polaritons in heavily doped GaN microstructures with terahertz radiation Open
We present the results of experimental and theoretical studies of the surface plasmon polariton excitations in heavily doped GaN epitaxial layers. Reflection and emission of radiation in the frequency range of 2–20 THz including the Restst…