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排序方式: 共有257条查询结果,搜索用时 15 毫秒
1.
Kalinina E. V. Kudoyarov M. F. Nikitina I. P. Dementyeva E. V. Zabrodskii V. V. 《Semiconductors》2022,56(3):184-188
Semiconductors - The results of the effect of irradiation with Ar ions on the structural, electrophysical, and optical characteristics of ultraviolet Cr/4H-SiC photodetectors in the spectral range... 相似文献
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This paper examines the feasibility of using electrophoretic deposition for producing thin films of cathode materials based on lanthanum nickel oxides (with the lanthanum nickelate La2NiO4 + δ (LNO) as the predominant phase). We have determined the particle size and zeta potential of nonaqueous suspensions of LNO micro- and nanopowders prepared by solid-state reactions, pyrolysis of liquid precursors, and laser evaporation of a target. Using ultrasonic processing, we have obtained stable LNO nanopowder suspensions in acetylacetone and an isopropanol + acetylacetone mixture, which have zeta potentials of +25 and + 38 mV, respectively. Electrophoretic deposition on a dense model cathode has produced thin bilayer coatings from electrode and electrolyte materials (LNO and Се0.8(Sm0.75Sr0.2Ba0.05)0.2O2–δ), which are of interest for solid oxide fuel cell technology. 相似文献
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A. A. Petukhov B. E. Zhurtanov K. V. Kalinina N. D. Stoyanov H. M. Salikhov M. P. Mikhailova Yu. P. Yakovlev 《Semiconductors》2013,47(9):1258-1263
The electroluminescent properties of an n-GaSb/n-InGaAsSb/p-AlGaAsSb heterostructure with a high potential barrier in the conduction band (large conduction-band offset) at the n-GaSb/n-InGaAsSb type-II heterointerface (ΔE c = 0.79 eV) are studied. Two bands with peaks at 0.28 and 0.64 eV at 300 K, associated with radiative recombination in n-InGaAsSb and n-GaSb, respectively, are observed in the electroluminescence (EL) spectrum. In the entire temperature range under study, T = 290–480 K, additional electron-hole pairs are formed in the n-InGaAsSb active region by impact ionization with hot electrons heated as a result of the conduction-band offset. These pairs contribute to radiative recombination, which leads to a nonlinear increase in the EL intensity and output optical power with increasing pump current. A superlinear increase in the emission power of the long-wavelength band is observed upon heating in the temperature range T = 290–345 K, and a linear increase is observed at T > 345 K. This work for the first time reports an increase in the emission power of a light-emitting diode structure with increasing temperature. It is shown that this rise is caused by a decrease in the threshold energy of the impact ionization due to narrowing of the band gap of the active region. 相似文献
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Several modifications of MIS-sensors manufactured using the thin-film laser evaporation technology with different insulator layers and metal electrodes are presented. Metrological characteristics of these MIS-sensors are established. Two types of the sensors possessing abnormally high and low sensitivities to H2, H2S, NO2 and NH3 are identified; the stated types are of practical interest in applications as sensitive elements of gas analyzers. Finally, the presence of catalytic properties in metal electrodes is demonstrated to be not necessary for sensitivity of the devices. This fact seems important for developing the microscopic theory of sensitivity of MIS-sensors. 相似文献
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Powder precursors have been prepared by means of the sol-gel technique and codeposition, and nanoceramics in the ZrO2-Al2O3-rare-earth (RE) oxide system (RE = Ce, Sc, or Y) based on them have been obtained. Physicochemical properties of the resulting
ceramic composites have been investigated. The energy model for oxygen-ionic transport processes in a solid solution based
on ZrO2, which relies on computer simulation procedure, has been proposed, and the structural, strength, and electrophysical characteristics
of the solid solution have been calculated. The obtained materials are promising as high-melting electrochemical sensors in
molten oxides. 相似文献
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Irina Kalinina Elena Bekyarova Qingxiao Wang Yas Fadel Al-Hadeethi Xixiang Zhang Faisel Al-Agel 《Fullerenes, Nanotubes and Carbon Nanostructures》2014,22(1-3):47-53
We report the formation of chromium clusters on the outer walls of single-walled carbon nanotubes (SWNTs). The clusters were obtained by reacting purified SWNTs with chromium hexacarbonyl in dibutyl ether at 100°C. The functionalized SWNTs were characterized by thermogravimetic analysis, XPS, and high-resolution TEM. The curvature of the SWNTs and the high mobility of the chromium moieties on graphitic surfaces allow the growth of the metal clusters and we propose a mechanism for their formation. 相似文献
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The possibility of controlling the aerodynamic characteristics of lifting airfoils by means of local periodic pulsed energy
supply in transonic flight regimes has been studied. Using a numerical solution of two-dimensional nonstationary equations
of gasdynamics, a change in the flow structure near a symmetric airfoil is determined as dependent on the amount of energy
supplied to the lower side of the airfoil in a range of attack angles. 相似文献