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 ISSUEPREVArticleNEXTMethods for Preparation of Catalytic MaterialsJames A. Schwarz, Cristian Contescu, and Adriana ContescuCite this: Chem. Rev. 1995, 95, 3, 477–510Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1995https://pubs.acs.org…
New analytical X-ray scattering-factor representations valid for the full range of sin Θ/λ from 0.0 to 6.0 Å−1 have been developed from fits of a linear combination of five Gaussians to the values of the scattering factors tabulated in International Tables for Crystallography (1992) [Vol. C. Dordrecht: Kluwer Academic…
Catalysis by heteropoly acids (HPAs) and related compounds is a field of growing importance, attracting increasing attention worldwide, in which many new and exciting developments are taking place in both research and technology [1–111, HPAs are polyoxometalates incorporating anions (heteropolyanions) having metal-oxy…
It has become common practice to employ, as a binding energy reference for x-ray photoelectron spectroscopy studies on nonconductive materials, the C(1s) spectra of the ubiquitous (adventitious) carbon that seems to exhibit an instantaneous presence on all air exposed materials. Despite this commonality, surface scien…
An overview is provided on the diversity of biosynthetic polyhydroxyalkanoic acids, and all hitherto known constituents of these microbial storage compounds are listed. The occurrence of 91 different hydroxyalkanoic acids reflects the low substrate specificity of polyhydroxyalkanoic acid synthases which are the key en…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSupported Metal Clusters: Synthesis, Structure, and CatalysisB. C. GatesCite this: Chem. Rev. 1995, 95, 3, 511–522Publication Date (Print):May 1, 1995Publication History Published online1 May 2002Published inissue 1 May 1995https://pubs.acs.org/doi/10.1021/cr00035a003https:/…
Abstract A new polymer‐ceramic nanocomposite has been synthesized consisting of well‐dispersed, two‐dimensional layers of an organically modified mica‐type silicate (MTS) within a degradable poly(ε‐caprolactone) matrix. A protonated amino acid derivative of MTS was used to promote delamination/dispersion of the host l…
We report the results of a large scale computer simulation of a binary supercooled Lennard-Jones liquid. We find that at low temperatures the curves for the mean squared displacement of a tagged particle for different temperatures fall onto a master curve when they are plotted versus rescaled time tD(T), where D(T) is…
In this article nanosphere lithography (NSL) is demonstrated to be a materials general fabrication process for the production of periodic particle array (PPA) surfaces having nanometer scale features. A variety of PPA surfaces have been prepared using identical single-layer (SL) and double-layer (DL) NSL masks made by…
An enhanced, numerically stable transmittance matrix approach is developed and is applied to the implementation of the rigorous coupled-wave analysis for surface-relief and multilevel gratings. The enhanced approach is shown to produce numerically stable results for excessively deep multilevel surface-relief dielectri…
The rigorous coupled-wave analysis technique for describing the diffraction of electromagnetic waves by periodic grating structures is reviewed. Formulations for a stable and efficient numerical implementation of the analysis technique are presented for one-dimensional binary gratings for both TE and TM polarization a…
Part 1 Liquid crystals - main types and properties: introduction - what is a liquid crystal? the building blocks nematics and cholesterics smectics columnar phases more on long-, quasi-long and short-range order remarkable features of liquid crystals. Part 2 Long- and short-range order in nematics: definition of an or…
Abstract FTIR measurements of sol fractions were carried out in order to assess side reactions during dicumyl peroxide (DCP) crosslinking of linear low density polyethylenes (LLDPEs) with homogeneous distribution of short chain branching. The changes of methyl and olefinic unsaturation concentration were measured as a…
Abstract Measurements of the coefficient of thermal expansion (CTE) of the crystalline lattice of two semicrystalline thermoplastic polyimides are reported. NEW‐TPI and LARC‐CPI polyimides were studied using elevated temperature wide‐angle x‐ray scattering (WAXS) from 25°C. To 325°C. To examine possible shifts in the…
Abstract An amphoteric cellulose derivative, O ‐carboxymethyl‐ O ‐2‐hydroxy‐3‐(trimethylammonio) propylcellulose (CM‐HTMAPC), was prepared by the etherification of O ‐carboxymethylcellulose (CMC) with (3‐chloro‐2‐hydroxy‐ n ‐propyl)‐trimethylammonium chloride in a NaOH solution. Apparent molecular sizes of the amphote…
Methods of preparing silicon nitride and materials as powders, and as materials consolidated from the powders, and also as films and coatings, are reviewed. Information on the structure and on the physicochemical properties of silicon nitride materials is analysed and discussed. The bibliography includes 172 reference…
Introduction Magneto-optical recording is an important mode of optical data storage; it is also the most viable technique for erasable optical recording at the present time. The MO read and write processes are both dependent on the interaction between the laser beam and the magnetic medium. In the preceding chapters w…
Introduction The diffraction of light plays an important role in optical data storage systems. The rapid divergence of the beam as it emerges from the front facet of the diode laser is due to diffraction, as is the finite size of the focused spot at the focal plane of the objective lens. Diffraction of light from the…
Abstract The rheological behavior of blends of natural rubber (NR) and styrene–butadiene rubber (SBR) latices has been studied with reference to the effects of blend ratio, shear rate, surface‐active agents (casein and sodium carboxymethyl cellulose), and temperature. When the SBR content was less than 50%, the viscos…
Bovine seminal ribonuclease (BS-RNase) is a homodimeric enzyme strictly homologous to the pancreatic ribonuclease (RNase A). Native BS-RNase is an equilibrium mixture of two distinct dimers differing in the interchange of the N-terminal segments and in their biological properties. The loop 16-22 plays a fundamental ro…