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Article
Synthesis of a High-Temperature Superconductor Y1–xFexBa2Cu3Oy by the Sol-Gel and Solid-State Methods
A modified version of the use of the sol-gel process at the initial stage of the synthesis of a high-temperature superconductor Y1–xFexBa2Cu3Oy with low Fe do** is proposed. The properties of the samples obtain...
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Article
Effect of the Formation Method of ZnO–In2O3 Composites on Their Structural Characteristics and Conductivity
Composites based on indium oxide containing different amounts of zinc oxide are synthesized by hydrothermal and impregnation methods. The phase composition, structure, and specific surface of the obtained comp...
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Article
Open AccessTunneling Mechanism for Changing the Motion Direction of a Pulsating Ratchet. Temperature Effect
A pulsating ratchet with a spatially periodic double-well potential profile undergoing shift fluctuations for half a period is considered. The motion direction in such a ratchet is determined by the probabilit...
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Article
Pinning of a Magnetic Flux in Polycrystalline YBa2Cu3O6.92 HTSC during Cooling in a Weak Magnetic Field
The behavior of fine-grained YBa2Cu3O6.92 HTSCs during cooling in a weak magnetic field is investigated. The magnetization of samples, the crystallite sizes is which are comparable with the magnetic field penetra...
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Article
Creation of Two-Dimensional High Temperature Superconductivity Under the Influence of an Electric Field
This study discusses the conditions for the occurrence of two-dimensional superconductivity under the action of an electric field on an La2 – xSrxCuO4 plate at a temperature lower than the maximum temperature of ...
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Article
Sensor Layers Based on Semiconductor Nanoparticles and Their Electronic Structure
Studies on modeling the charge distribution in semiconductor nanoparticles are analyzed. The charge distribution largely depends on the type of nanoparticles and the concentration of conduction electrons. In t...
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Article
Effect of the Type of the Crystal Phase of In2O3 On Its Conductivity and Sensor Properties in Hydrogen Detection
Indium oxide is synthesized hydrothermally from an aqueous or alcoholic solution of indium nitrate. The phase composition and structure of the synthesized samples, as well as their conductivity and sensory res...
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Article
Metal-Oxide Nanocomposites for Highly Efficient and Selective Detection of Various Gases
The data on the efficiency of chemical sensors consisting of binary mixtures of semiconducting metal oxides having different conducting and catalytic properties have been considered. The sensors exhibit a high...
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Article
Inertial Reciprocating Photomotor
We present a theory for an inertial reciprocating Brownian motor driven by deterministic dichotomous fluctuations in the parameters of a Brownian particle and confinement potentials (which can be created by op...
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Article
Structural Characteristics of In2O3-Based Nanocomposites Synthetized by the Hydrothermal Method
Oxides of indium, zinc, cerium, and composites based on them are synthesized by the hydrothermal method. The phase composition, particle and pore sizes, and specific surface area are studied by the XRD, BET, a...
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Article
Evolution of the Structure and Magnetic Properties of the High-Tc Superconductor YBa2Cu3O6.92 in the Sol–Gel Synthesis Process
We have studied the effect of sol–gel synthesis conditions on the structural and magnetic properties of the high-Tc superconductor YBa2Cu3Oy (y = 6.92 ± 0.02). Two low-temperature (<800°C) synthesis procedures ha...
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Article
Sensory Effect toward Hydrogen in a Nanostructured CeO2–In2O3 System
A model is built of the sensory process in sensors based on CeO2–In2O3 nanocomposites. It is shown there is an increase in the response to hydrogen and a shift in the maximum of the sensory curve to lower tempera...
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Article
A Nonempirical Study of Oxygen Adsorption on the (011) In2O3 Surface
Using density-functional calculations, we demonstrate that adsorption of an oxygen molecule on the (011) indium oxide surface with a neutral oxygen vacancy is an activationless process. The stretching frequenc...
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Article
Purification of Aqueous Solutions Containing Salts of Heavy Metals and Ballast Ions
The purification of aqueous solutions containing, together with the salts of heavy metals (lead and copper), sodium and calcium salts are studied. It is shown that cleaning with the use of AK-2 cation-exchange...
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Article
Erratum to: Effect of Composition and Structure of Metal Oxide Composites Nanostructured on Their Conductive and Sensory Properties
The surname of the fourth author should read L. I. Trakhtenberg.
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Article
Effect of the Method for Producing the ZnO–In2O3 Composite on its Sensor Activity in Hydrogen Detection
The sensor activity in the detection of hydrogen in ZnO–In2O3 composites obtained by impregnating In2O3 powder nanoparticles by zinc nitrate and mixing the standard nanoparticles of powders of zinc and indium oxi...
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Article
Open AccessEffect of Composition and Structure of Metal Oxide Composites Nanostructured on Their Conductive and Sensory Properties
The relationship between the structure and properties of nanoscale conductometric sensors based on binary mixtures of metal oxides in the detection of reducing gases in the environment is considered. The senso...
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Article
Formation of Fermi Arcs at T \( \ll \) Tc in the Vicinity of d-Wave Nodes of Structurally Inhomogeneous YBa2Cu3O6.92 HTSCs
The influence of structural inhomogeneity on a superconducting gap near d-wave nodes is co-nsidered for optimally doped YBa2Cu3O6.92 HTSCs. To this aim, specific heat in the temperature range of T = 2‒10 K at mag...
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Article
Light-Driven Reciprocating Host–Guest Molecular Machines
General operating principles have been established for light-driven molecular machines with different ground- and excited-state potential energies of a Brownian particle in a surrounding force field. The optom...
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Article
Crown Ethers: Selective Sorbents of Radioactive and Heavy Metals
The experimental data on methods for the preparation of sorbent systems containing crown ethers and their complexing properties with cations of some radioactive and heavy metals were summarized and analyzed. T...
