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排序方式: 共有97条查询结果,搜索用时 15 毫秒
1.
Dissociative adsorption at 300 K is shown to proceed only on unreconstructed Pt(100)–(1×1) surface. When heated, NO (ad) layers behave in a similar way on both surfaces. Dissociation products are N2 and O(ad). Adsorption on the (hex) surface is supported to occur in islands. The island size in the saturation layer appears to be 40 Å. 相似文献
2.
Balandin S. F. Donchenko V. A. Zemlyanov Al. A. Myshkin V. F. Khan V. A. Abramova E. S. 《Russian Physics Journal》2020,63(5):824-830
Russian Physics Journal - Electrical conductivity in a laser beam channel has been investigated. Oscillations of the conductivity caused by the oscillation motion of electrons in laser-induced... 相似文献
3.
V. A. Donchenko A. I. Yakimov A. A. Zemlyanov V. V. Kirienko 《Russian Physics Journal》2010,53(5):504-507
Results of investigations into the time characteristics of photosensitive layers based on Ge/Si nanoheterostructures excited
by femtosecond laser pulses with a wavelength of 1.55 μm are given. It is demonstrated that the leading front duration of
the photoresponse pulse for the examined specimens excited by laser pulses of 120 fs duration does not exceed 30–40 пs. 相似文献
4.
Christoph Rameshan Werner Stadlmayr Christian Weilach Simon Penner Harald Lorenz Michael Hvecker Raoul Blume Tulio Rocha Detre Teschner Axel Knop‐Gericke Robert Schlgl Norbert Memmel Dmitry Zemlyanov Günther Rupprechter Bernhard Kltzer 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2010,122(18):3292-3296
5.
V. A. Donchenko Al. A. Zemlyanov N. S. Panamarev V. A. Kharenkov 《Russian Physics Journal》2011,54(4):493-499
Spectral and energy luminescence characteristics of R6G dye solutions in ethanol with addition of Ag nanoparticle suspensions
in different aggregate states are experimentally investigated. It is demonstrated that incorporation of non-aggregated and
aggregated nanoparticles causes the superluminescence thresholds in R6G solutions to decrease. It is established that the
optical properties of the laser beam propagation channel are transformed when low-power (20 mW) cw laser radiation passes
through the suspension of nanoparticles. This is manifested through the occurrence of a region with enhanced nanoparticle
density in the laser beam center, on which diffraction of laser radiation is observed. 相似文献
6.
7.
This paper describes measurements of the inelastic neutron scattering spectrum of samples of the metallic glass Ni64Zr36 grown using an isotope of Ni. These measurements were used to reconstruct the partial densities of vibrational states of
the atoms Ni and Zr. A weakening of the interatomic interactions of Ni with surrounding atoms was identified, but found to
be less important than numerical calculations predicted.
Fiz. Tverd. Tela (St. Petersburg) 40, 3–6 (January 1998) 相似文献
8.
The theoretical aspects of propagation of laser radiation along slanted paths in the atmosphere at high altitudes under conditions of stimulated Raman scattering (SRS) by molecular nitrogen are considered. The SRS power conversion coefficient, the transverse intensity distribution, and the effective size of laser beams with different initial spatial profiles are numerically simulated along the propagation path. The behavior of these parameters is studied for different ratios between the optical path length and the length of free diffraction of the initial laser beam. It is shown that, at a given level of the increment of the SRS amplification, the diffraction can both increase and decrease the efficiency of the Raman interaction of waves owing to the intensity redistribution in the transverse beam profile. This effect is the most pronounced for beams with non-Gaussian initial spatial intensity profiles. 相似文献
9.
Jewett S Zemlyanov D Ivanisevic A 《Langmuir : the ACS journal of surfaces and colloids》2011,27(7):3774-3782
The well-defined structure and high stability of peptides make them attractive biotemplates for low-temperature synthesis of semiconductor nanocrystals. Adsorbed peptide monolayers could also potentially passivate semiconductors by preventing regrowth of the oxide layer. In this work, the adsorption and passivation capabilities of different collagen-binding peptides on InAs surfaces were analyzed by X-ray photoelectron spectroscopy (XPS). Before peptide functionalization, Br(2)- and HCl-based etches were used to remove the native oxide layer on the InAs surfaces. The presence of the N 1s peak for peptide-functionalized samples confirms the adsorption of peptides onto the etched InAs surfaces. Calculated coverages were similar for all peptide sequences and ranged from ~20 to 40% of a monolayer using the deconvoluted C 1s spectra and from ~2 to 5% for the N 1s spectra. The passivation ability of the peptides was analyzed by comparing the ratios of the oxide components to the nonoxide components in the XPS spectra. The thickness of the oxide layer was also approximated by accounting for the attenuation of the substrate photoelectrons through the oxide layer. We find that the oxide layer regrowth still occurs after peptide functionalization. However, the oxide layer thicknesses for peptide-functionalized samples do not reach as received levels, indicating that the peptides do have some passivation ability on InAs. 相似文献
10.