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。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Diversity in Solvated Lanthanide Halide ComplexesWilliam J. Evans, Julie L. Shreeve, Joseph W. Ziller, and Robert J. DoedensCite this: Inorg. Chem. 1995, 34, 3, 576–585Publication Date (Print):February 1, 1995Publication History Published online1 May 2002Published…
<div class="htmlview paragraph">In the Dual Equal variable camshaft timing strategy, the intake and exhaust events are equally phase-shifted relative to the crankshaft as a function of engine operating conditions. The primary emphasis is on improved fuel economy and emissions at part load. The external EGR syste…
A differential scanning calorimeter with a temperature range of 77 to 873 K has been developed for use in combination with either time-resolved X-ray scattering or high-resolution energy-dispersive powder diffraction studies using synchrotron radiation. The first results of successful experiments are briefly described.
The synthesis of chiral liquid crystalline diacrylates is described. By mixing one of them with non-chiral liquid crystalline diacrylates. cholesteric phases are obtained of which the wavelength of reflection can be chosen by the composition of the mixture. After isothermal photopolymerization of the mixture a crossli…
D/H exchange between methane and a zeolite is the simplest reaction between a zeolitic proton and a hydrocarbon. Because of its simplicity, it offers a unique opportunity to test out possibilities that are offered by present-day computational techniques to obtain theoretical insight into the catalytic action of zeolit…
A computer experiment on foam rheology is performed with a simplified model in which the viscous dissipation in the liquid phase is taken into account. The simulation is carried out under the sheared boundary condition with a small shear rate. It is observed that violent flow like that of an avalanche occurs intermitt…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAnomalous mixing behavior of polyisobutylene with other polyolefinsR. Krishnamoorti, W. W. Graessley, L. J. Fetters, R. T. Garner, and D. J. LohseCite this: Macromolecules 1995, 28, 4, 1252–1259Publication Date (Print):February 1, 1995Publication History Published online1 Ma…
An appearance of an easy orientation axis of a nematic liquid crystal on the isotropic aligning surface under the light absorption by in-bulk azo dye molecules is observed. It is shown that orientation of LC molecules in the irradiated region is close to the direction of the exciting beam polarization. Accompanying to…
1 An Introduction to Clay Minerals and Isotope Geochemistry.- 1 Fundamentals of Clay Mineralogy.- 1.1 Definition.- 1.2 Basic Structural Units and Layer Types.- 1.3 Classification of Clay Minerals.- 1.4 Thermodynamic Considerations for Clay Minerals.- 1.5 Clay Separation and Characterization.- 2 Principles of Isotope G…
Model oxide-supported metal catalysts have been prepared by evaporating a metal (e.g., Cu, Pd) onto an oxide ( SiO 2 , Al 2 O 3 ) thin film (~100 Å) which, in turn, is supported on a refractory metal (Mo, W, Ta) surface. The deposited metal films, upon annealing, form small metallic clusters on the oxide surface whose…
The sol–gel process represents a room‐temperature method of producing a wide range of ceramic materials through the formation of a glassy network by the polymerization of suitable monomers. The use of the technique to produce, for example, sonogels, organic‐inorganic composites, NLO glasses, and electrooptical materia…
Abstract It was observed that surface-enhanced Raman scattering (SERS) spectra of p-nitrothiophenol (PNTP) self-assembled monolayer adsorbed on a smooth silver electrode changed by laser light irradiation. The SERS spectra were identical with those of p-aminothiophenol (PATP). This reaction proceeded even at the elect…
The shape memory effect has been observed in several material systems: metals, ceramics and polymers. Mainly metallic systems in which a strain-induced or thermallyinduced martensitic transformation occurs, have been explored. Also, recent discoveries have shown that shape memory effects in specific systems can also b…
New copolymers containing imide and different heterocyclic units such as oxadiazole, benzoxazole, or pyridazine, together with hexafluoroisopropylidene groups, have been synthesized by solution polycondensation of appropriate aromatic diamines with diacid chlorides incorporating preformed imide rings and hexafluoroiso…
Abstract The electrical and optical properties were studied concerning α-(BETS)2I3 and α-(BEDT-STF)2I3, which are isostructural to α-(BEDT-TTF)2I3. It has been shown that α-(BETS)2I3 and α-(BEDT-STF)2I3 undergo metal-insulator transitions at around 50 and 80 K, respectively, and that their electrical resistivities exh…
The electrochemical, electronic, charge-transport, and ion-transport properties of a conducting polymer bilayer, prepared using polypyrrole/poly(styrenesulfonate) (PP/PSS) and poly(3-octylthiophene) (POT) have been investigated by cyclic voltammetry, optoelectro-chemistry, and a combination of electrochemical and grav…
Abstract SERS spectra of cytosine, 1‐methylcytosine, 5‐methylcytosine and 1,5‐dimethylcytosine on a gold colloid are reported. A tentative assignment of Raman bands is made by comparison with the normal Raman spectra in aqueous solution. This analysis reveals a preferred non‐planar orientation of cytosine and 1‐methyl…
Transition metals can dissociate hydrogen to a surface mobile species called spillover hydrogen ( H so ). Similarly, oxides like α- Sb 2 O 4 , BiPO 4 , Bi 2 O 3 (donors) can dissociate molecular oxygen to a mobile surface species ( O so ). These metals or oxides are conveniently called donors. This article reviews eff…
Abstract Tetraglycidyl 4,4′‐diaminodiphenylmethane (TGDDM) undergoes homopolymerization on heating. Intramolecular reactions which compete with crosslinking favor the formation of cyclic structures with increasing thermal and fire resistance of the resin, whereas physical mechanical properties tend to decrease. The me…
Lactic acid has been an intermediate-volume specialty chemical (world production ∼ 40,000 tons/yr) used in a wide range of food processing and industrial applications. Lactic acid has the potential of becoming a very large volume, commodity-chemical intermediate produced from renewable carbohydrates for use as feedsto…