Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Extensive experimental studies of the OH stretching region of the Raman spectra of polycrystalline ice Ih and low density amorphous solid water (H2O (as)) are reported. Analysis of these spectra, using insights from theoretical calculations, leads to the following conclusions: (i) The overall span and distribution of…
We have studied interactions between a domain wall and phonons in a one-dimensional-model system of a structurally unstable lattice with a double-well local potential and nearest-neighbor coupling. We find that a nonlinear effect in the interacting phonon amplitudes gives rise to a Brownian-like motion of isolated dom…
The steady-state solution of the nonlinear heat-conduction equation when the thermal conductivity is strongly temperature dependent is expressed (for arbitrary geometry and heat source) in terms of the corresponding solution for the linear heat-conduction case. This permits a closed-form expression for the maximum tem…
The intensities of plasmon-loss satellites of core lines and the valence band in x-ray-photoemission spectra (XPS), as well as of Auger lines of A1 are determined by convoluting the no-loss spectra with an asymmetric Lorentzian line shape. Intrinsic processes contribute 25% of the total plasmon intensity of XPS core l…
A polarization-modulation ellipsometric technique was used to make direct measurements of the optical dielectric constants of single-crystal specimens of the nonstoichiometric tungsten-bronze compound ${\mathrm{Na}}_{x}\mathrm{W}{\mathrm{O}}_{3}$ ($0.52<x<0.94$) and W${\mathrm{O}}_{3}$, in the energy range from…
Dynamical calculations of the intensities of normally-incident low-energy electrons diffracted from $\mathrm{ZnO}(10\overline{1}0)$, performed using an "exact" matrix-inversion method, are compared both with earlier calculations based on the renormalized-forward-scattering (RFS) method and with measured intensities. T…
The transmission spectra in the intramolecular stretching region have been measured for thin films of H2O and D2O polycrystalline ice Ih and amorphous solid water. The data have been reduced to obtain the complex refractive index in this region via an iterative procedure designed to account for reflection and interfer…
Thermal conductivity measurements have been performed in nematic and smectic liquid crystalline phases by the forced Rayleigh light-scattering technique. Results show clearly that the thermal transport anisotropy is governed by the molecular shape anisotropy and by the molecular orientation but is independent of the s…
The wastage effects of a sodium-water reaction resulting from a small leak in a liquid-metal fast breeder reactor steam generator were investigated. These experiments were conducted at low steam injection rates, ranging from 0.07 to 13.8 g/s, with the following test conditions: sodium temperature 480°C, sodium velocit…
Small disks of molybdenum were irradiated in the Oak Ridge Research Reactor to a fast-neutron fluence of about 1 × 1021 neutrons cm−2, at temperatures between 220 and 900°C. The defect structure in the neutron-irradiated specimens as determined by transmission electron microscopy (TEM) consisted of both dislocation lo…
Abstract The addition of lithium chloride to solutions of poly(5,5′‐bibenzimidazole‐2,2′‐diyl‐1,3‐phenylene) (PBI) and N,N‐dimethylacetamide (DMAC) resulted in the elongation of the PBI molecule in solution. This elongation is due to the association of lithium and/or chloride ions in the region of the nitrogen atoms o…
Electron paramagnetic resonance spectra of the Gd3+ ion in various rare-earth trinitrate hexahydrate (RNH) hosts have been studied at different temperatures. The values of the parameters are computed using a rigorous least-squares fitting procedure in which all the resonant line positions obtained for various orientio…
Abstract The absorption spectra of Tl2 + in KCl crystals have been measured from 77 to 300 K. Tl2 + gives rise to five absorption bands peaking at 1760, 860, 680, 460 and 233 nm. These oscillator strengths have been calculated. Optical excitation in the 460 nm band destroys the Tl2 + and Tl ++ bands and produces the T…
Abstract Die Titelverbindung entsteht aus Kupfer(I)‐trimethylsiloxid durch thermische Abspaltung von Hexamethyldisiloxan. Ihre Struktur wurde röntgenographisch bestimmt (Raumgruppe C 2/ m , Z = 2) und bis R = 0.079 verfeinert. Die Verbindung stellt ein voluminöses, kugelförmiges Molekül dar, das im inneren Teil achtze…
Magnetism of LaNi 1- x Fe x O 3 (0≤ x ≤0.2) is investigated from 7 K to 300 K. The susceptibility of LaNiO 3 is temperature independent. The increment of the susceptibility, Δ χ, by Fe doping obeys the Curie-Weiss law at high temperatures. The effective number of Bohr magnetons is about 4 µ B per Fe ion. The asymptoti…
Tissue extracts from the digestive tract of the wood-boring bivalve Bankia gouldi were tested for their ability to degrade celluloses and wood to soluble sugars. Tissue extracts showed high levels of glucose production from cellobiose, demonstrating the presence of β-glucosidase. The crystal structure of cellulose det…
Small-angle scattering intensities were observed for amorphous Pd80Si20, which was irradiated by fast neutrons to a fluence of 5 × 1020 neutrons cm−2. A broad hump was observed at 2 sin θ/λ = 0.05 Å−1. The structural inhomogeneities produced by the neutron irradiation are discussed with the aid of the results of wide-…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic Raman spectra of hexahalogenoosmate(IV) ions in the resonant conditionKenichi Ikeda and Shiro MaedaCite this: Inorg. Chem. 1978, 17, 10, 2698–2701Publication Date (Print):October 1, 1978Publication History Published online1 May 2002Published inissue 1 October 1978…
Kittel's free energy expression with all the fourth order cross terms of two sublattice polarizations was dealt with. Phase diagrams of four phases, the nonpolar, polar, antipolar, and semipolar phase, were calculated for various sets of expansion coefficients. For a set of coefficients, the semipolar phase is absolut…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectron-transfer kinetics of chlorotetrakis(p-chlorophenyl)porphinatomanganese(III) in dimethyl sulfoxide-imidazole mixturesK. M. Kadish, M. Sweetland, and J. S. ChengCite this: Inorg. Chem. 1978, 17, 10, 2795–2797Publication Date (Print):October 1, 1978Publication History…