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1.
2.
离子型共聚单体参与下的全氟丙烯酸酯无皂乳液共聚 总被引:4,自引:0,他引:4
离子型共聚单体参与下的全氟丙烯酸酯无皂乳液共聚;全氟烷基丙烯酸酯;无皂乳液;离子型共聚单体 相似文献
3.
A bistable spatial optical device has been developed on the basis of a spatial light modulator which contains photosensitive and electrooptical liquid crystal layers, where an internal feedback loop is established. 相似文献
4.
Lasers and amplifiers in a single fiber have been developed rapidly, especially for optical fiber communication and various sensors, in the recent years. However, remarkable progress and achievement have been made mainly in silica fiber doped with rare earth elements. In this paper, we report the progress on the development of the Yb3+-doped phosphate fiber laser. 相似文献
5.
V. M. Apatin V. O. Kompanets V. N. Lokhman N. -D. D. Ogurok D. G. Poydashev E. A. Ryabov S. V. Chekalin 《JETP Letters》2011,94(7):570-573
Intracluster reactions that are induced in (CF3I)
n
clusters by femtosecond ultraviolet radiation, including the reaction of the formation of the I2+ molecular ion, have been directly observed. It has been shown that there are two channels of the formation of I2+ ions with the characteristic times τ1 ≈ 1 ps and τ2 ≈ 7 ps. A model of these reactions has been proposed that is in good agreement with the experimental data. 相似文献
6.
MATTHEW T. STONE PIETER J. IN 'T VELD YING LU ISAAC C. SANCHEZ 《Molecular physics》2013,111(17):2773-2792
In this study Monte Carlo simulations are used to determine the solvation properties of model hydrophobic (xenon and hard sphere) and hydrophilic (dimethyl ether) solutes in SPC/E water. Various contributions to the experimental solvation entropy, including the solvent reorganization entropy, have been determined. The main conclusion drawn, which is in accord with solubility data, is that poor solubility correlates with poor solute-water interaction. At room temperature, energy dominates the aqueous solubility of both hydrophobic and hydrophilic solutes, rather than entropy. However, at higher temperatures the solubility can pass through a minimum, and then entropy becomes dominant. Another interesting finding is the presence of larger than expected cavities in water. Two different simulation results support this finding. This unexpected hollow structure in water explains why a hard sphere solute is more soluble in water than in a comparable hard sphere or Lennard-Jones solvent. Hydrogen bonding causes water to aggregate into clusters that produce a few large cavities rather than many smaller cavities. The propensity for clustering also explains why water gives the illusion of being a low density liquid. Sufficient theoretical apparatus is developed to connect theoretical solvation properties to those measured by simulation and experiment. Finally, based on gas solubility, an intuitive hydrophobic/hydrophilic scale is developed. 相似文献
7.
A. A. Melnikov O. V. Misochko V. O. Kompanets A. L. Dobryakov S. V. Chekalin 《Journal of Experimental and Theoretical Physics》2010,111(3):431-439
The decay of the photoexcited state of a bismuth single crystal is investigated in the wavelength range from 400 to 900 nm
by means of femtosecond laser reflection spectroscopy. Oscillations produced by coherent fully symmetric A
1g
phonons have been detected in the photoinduced response, along with a relaxation component. The dynamics of the electronic
subsystem of the crystal is shown to be characterized by three values of the decay time: 1 ps, 7 ps, and ∼1 ns. The spectral
dependence of the reflectivity oscillation amplitude has been measured; the possible cause of the shape of the derived curve
is described. 相似文献
8.
It is shown both experimentally and theoretically that interference effects play the key role in the formation of frequency-angular
spectrum of the filament conical emission. For the first time, we investigated experimentally the transformation of the conical
emission frequency-angular spectrum with an increase in the filament length inside fused silica. We discovered the appearance
of fine structure of the conical emission rings produced by lengthy filament. It is shown that the conical emission frequency-angular
spectrum is produced by interference of coherent radiation from one or several moving point sources in the filament. The shape
of the conical emission spectrum depends on the medium material dispersion, the spectrum structure is determined by length
and relative location of filament emitting regions. 相似文献
9.
V. G. Chigrinov I. N. Kompanets A. A. Vasiliev 《Molecular Crystals and Liquid Crystals》2013,570(1):193-207
The behaviour of homogeneously aligned nematic liquid crystal layers in inhomogeneous electric fields has been theoretically and experimentally investigated. The variation of the phase retardation of monochromatic light along nematic liquid crystal layer at the edges of a cell electrode has been obtained. Anisotropic character of the resolution of liquid crystal devices is shown. 相似文献
10.
M. IN HET PANHUIS C. H. PATTERSON R. M. LYNDEN-BELL 《Molecular physics》2013,111(6):963-972
Atomistic simulations are reported of a model of CO2 in water. CO2 is modelled by partial charges and Lennard-Jones interaction sites on each atom; the SPC/E model for water is used. Good agreement with experiment is found for the translational diffusion constants. The variation of the dynamics with the potential parameter was investigated. As expected, the orientational correlation times increase as the magnitude of the quadrupole moment is increased, but the translational diffusion constants are found to be surprisingly insensitive to the magnitude of the CO2 quadrupole moment. The translational friction coefficient was resolved into electrostatic, Lennard-Jones and cross-terms; the Lennard-Jones contribution is found to be the largest. Varying the Lennard-Jones size parameter affects both translational and reorientational motion. In order to try to understand these results further, the variation of solvation free energy was investigated and the solvent structure around carbon dioxide was examined as the electrostatic and Lennard-Jones parameters were changed. The temperature dependence of the self-diffusion constant of pure SPC/E water was determined. 相似文献