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。
Erbium-doped yttria-stabilized zirconia (YSZ) single crystals of 84ZrO 2 /16YO 1.5 composition have been studied by electron paramagnetic resonance (EPR), optical absorption and photoemission techniques at temperatures between 10 and 680 K. At 10 K the Stark-structure of the 4 I 15/2 and 4 S 3/2 multiplets has been re…
A Mach–Zehnder interferometer with a pulsed dye-laser light source is used to observe the collapse of laser-produced cavitation bubbles in water near a rigid transparent polymeric boundary. Vapor bubbles with a maximum radius of about a millimeter are formed using a Q-switched Nd:YAG laser operating at 1.06 μm with a…
Third-harmonic generation measurements have been made for the first time on oriented films of halogen-bridged mixed-valence platinum complexes for the pump wavelength region from 0.6 to 1.0 μm. The ‖χ(3)(−3ω;ω,ω,ω)‖ spectra obtained by the Maker’s fringe method show a distinct peak at about 1.8 eV with the peak value…
We have studied the chemical vapor deposition of copper from 1,5-cyclooctadiene Cu(I) hexafluoroacetylacetonate, a moderately volatile yellow cystalline solid. It yields pure copper by pyrolytic decomposition at 150–250 °C, produces copper films with near bulk resistivity, and has the advantage of being air stable at…
Depositing alkali metal into a molecular oxygen layer dispersed on a Kr film produces alkali-metal superoxides containing the ${\mathrm{O}}_{2}^{\mathrm{\ensuremath{-}}}$ species for photoemission and near-edge study. The O K-edge spectrum of ${\mathrm{LiO}}_{2}$, ${\mathrm{KO}}_{2}$, and ${\mathrm{CsO}}_{2}$ is in go…
Direct evidence for the creation of oxygen-vacancy, oxygen-interstitial pairs in ${\mathrm{SiO}}_{2}$ glasses by an excitonic mechanism is developed from an electron-spin-resonance study of high-purity fused silicas exposed to highly focused 6.4-eV excimer laser light.
A relation for the temperature evolution of multicomponent porous ices is derived from the energy equation of multicomponent systems. It is demonstrated that the predominant energy transfer mechanisms can be incorporated into an effective thermal conductivity (λ e ƒƒ ), which is strongly temperature dependent, and tha…
. The literature on the diagenetic conversion of smectite layers to illite layers in mixed-layer illite/smectite is reviewed. According to this smectite layers are converted to illite layers during diagenesis at temperatures above 55°C and illite/smectites become IS ordered at about 100°C and at illite percentages of…
A high reverse breakdown voltage hydrogenated amorphous carbon (a-C:H)/crystalline silicon (c-Si) heterojunction diode has been successfully prepared by the photochemical vapour deposition (photo-CVD) method. This method has the advantage of being free from RF radiation. There is a lower density of fixed charges at th…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
It has often been said that 'the structure factors of all liquids (and glasses) look the same'. Those working in the field know that there is a certain truth to this, as many of the basic features are determined by hard sphere packing. However they also know that there are differences, sometimes subtle, which depend o…
Measurements have been made of the x-ray reflectivity from ultrathin, amorphous carbon films both before and after annealing. Analysis of the x-ray results indicates that annealing causes an increase in film thickness with a corresponding decrease in density. Such behavior is uncharacteristic of amorphous thin films a…
We have investigated the thermal conductivity of large diamond samples grown by both hot filament and microwave plasma assisted chemical vapor deposition in order to study in detail the processes limiting heat conduction in this system. For samples containing nearly 100% diamond material and no apparent defects, the t…
The three-dimensional structure of hevein, a low molecular weight protein isolated from the latex of Hevea brasiliensis, has been determined by X-ray diffraction at 2.8 A resolution. The protein crystallizes in space group P2(1)2(1)2(1), with lattice constants a = 21.78, b = 31.86, c = 51.12 A. The structure was solve…
An X-ray single-crystal determination of the CuO structure has been made at 196 K, i.e. below the Neel temperature 230 K, and, as a check, the crystal structure at room temperature was also determined. The correct space group for the structure at both temperature was found to be Cc. Earlier results of magnetic and neu…
The perovskite structure of the relaxor PbMg 1/3 Nb 2/3 O 3 (PMN) is studied using X-ray and neutron powder diffraction data. The static diffuse scattering (SDS) observed in the diffraction patterns at low temperatures is interpreted using a two-phase Rietveld analysis. The structural model is based on a long-range st…
Abstract The interaction between several polymeric materials, typical of those that have application as parenteral product containers, and 16 marker solutes was evaluated. Polymers used included polypropylene, polyvinyl chloride, ethylenevinyl acetate, an olefin rubber, a polyester ether block copolymer, and various c…
Abstract Compression ultrasonic velocity, longitudinal ultrasonic absorption, and heat of mixing for NR‐BR, NR, NBR, and NR‐IIR rubber blends were measured. Results show the applicability of examining the compatibility degree by using longitudinal ultrasonic absorption techniques. Results showed that NR‐BR blends are…
Abstract Silicone polyimides were made with siloxane‐equilibrated 1,3‐bis (3,4‐dicarboxyphenyl) ‐ 1,1,3,3‐tetramethyldisiloxane dianhydride (PADS) as the soft portion and [(1‐methylethylidene) bis (4,1‐phenyleneoxy)] bis‐1,3‐isobenzofurandione (BPADA) as the hard portion in combination with either para or meta ‐phenyl…
Abstract Systematic studies of the gelation of both buffered and unbuffered aqueous Cr +3 /polyacrylamide solutions show that the gelation time is a strong function of pH, increasing by about one order of magnitude per unit decrease in pH for polyacrylamides less than about 7.5% hydrolyzed. The gelation rate also depe…