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。
The influence of the chemical environment on the low-energy ion scattering (LEIS) intensities from aluminum and nickel is investigated by studying a number of different alloys (Ag80Al20, Ni80Pt20, NiAl{110}) and oxides (γ-Al2O3, α-Al2O3, α-Al2O3 sapphire {11̄02}, NiO, 14 wt % Ni/γ-Al2O3). The neutralization behavior o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel Diprophyrins Containing N4 and N3S Cores: Synthesis, Characterization, and Electrochemical PropertiesR. P. Pandian and T. K. ChandrashekarCite this: Inorg. Chem. 1994, 33, 15, 3317–3324Publication Date (Print):July 1, 1994Publication History Published online1 May 2002P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of Sterically Stabilized ColloidsUlrike Genz, Bruno D'Aguanno, Jan Mewis, and Rudolf KleinCite this: Langmuir 1994, 10, 7, 2206–2212Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 1994https://pubs.acs.org/…
Abstract Two cylinder‐forming polystyrene‐ block ‐polybutadiene block copolymers of type A‐B with antisymmetric composition (polymer P1 with A : B = 3 : 1 (w/w) and polymer P2 with A : B = 1 : 3 (w/w)) and their binary mixture were studied by small‐angle X‐ray scattering (SAXS) and transmission electron microscopy (TE…
The frequencies of transverse-optical \ensuremath{\Gamma} phonons in ${\mathrm{KNbO}}_{3}$ and ${\mathrm{KTaO}}_{3}$ are calculated in the frozen-phonon scheme making use of the full-potential linearized muffin-tin orbital method. The calculated frequencies in the cubic phase of ${\mathrm{KNbO}}_{3}$ and in the tetrag…
Angle-resolved photoemission from both (100) and (111) oriented, natural type IIb diamond was used to study the electronic structure of diamond. A negative electron affinity (NEA) was found on the 2×1 reconstructed diamond (100) surface. Photoemission spectra of NEA surfaces exhibit a distinctive peak due to emission…
Abstract Microphase separation in solutions of weakly charged polyelectrolytes in poor solvents is studied in the weak segregation limit within the framework of the mean field approximation using a method first developed by Leibler. As a result a complete phase diagram of the solution near the critical point is obtain…
The effect of 15 vol% particulate diamond reinforcement on the thermal conductivity of a cordierite matrix was studied as a function of diamond particle size from room temperature to 700°C. The thermal conductivity was found to increase with increasing particle size to a maximum increase of about 75% for a mean partic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCharge-Transfer States and Antiferromagnetism of Bridged Cu Dimers: Application to OxyhemocyaninFelix Tuczek and Edward I. SolomonCite this: J. Am. Chem. Soc. 1994, 116, 15, 6916–6924Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published…
The role of at. and mol. oxygen precursors in the overall catalytic cycle for ammonia dissocn. is analyzed using first-principle d. functional calcns. Adsorption energies for ammonia, mol. oxygen, NHx, NO, and various intermediates and adatoms were computed from geometry optimized calcns. on the model Cu(8,3) cluster…
Bonding in the hexagonal, cubic (zincblende), rhombohedral, and wurtzite phases of boron nitride was characterized using core-level photoabsorption. In the boron and nitrogen 1s photoabsorption cross section we observed resonances that were unique to each of the phases and that were associated with the sp2 or sp3 bond…
The quasi-static coupling coefficients, k/sub 13/ and k/sub 33/, for electrostrictive ceramics are computed analytically. The calculation is based on a three-dimensional constitutive relation that models both electrostriction and nonlinear dielectric behaviors. The results show that the coupling factors depend on the…
The Bacillus subtilis genes tpi, pgm, and eno, encoding triose phosphate isomerase, phosphoglycerate mutase (PGM), and enolase, respectively, have been cloned and sequenced. These genes are the last three in a large putative operon coding for glycolytic enzymes; the operon includes pgk (coding for phosphoglycerate kin…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSubstituted Azole Derivatives as Nonlinear Optical ChromophoresRobert D. Miller, Victor Y. Lee, and Christopher R. MoylanCite this: Chem. Mater. 1994, 6, 7, 1023–1032Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1 July 1…
The synthesis and characterization of a chiral dendrimer in its racemic form is reported. The chirality of this macromol., with a mol. wt. of 2831, is based on a pentaerythritol core, acting as a stereocenter with 4 dendritic substituents of different generation. The synthesis makes use of a newly developed, general r…
The advances in recombinant DNA technology in recent years have had a dramatic effect on the area of protein crystallization. Large amounts of pure protein produced in various expression systems have made it possible to conduct experiments that would have been impossible with material from natural sources. With many m…
We report the first investigation of the optical anisotropy of H- and SiO2-terminated Si surfaces. We examine six different orientations: (110); several vicinal (111); (113); and vicinal (001). Observed reflectance-difference (RD) spectra fall into two classes according to whether the surface normal is oriented from […
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCreation of Templated Complex Topological Morphologies in Colloidal SilicaSong-Yuan Chang, Lei Liu, and Sanford A. AsherCite this: J. Am. Chem. Soc. 1994, 116, 15, 6745–6747Publication Date (Print):July 1, 1994Publication History Published online1 May 2002Published inissue 1…
The structure and electronic properties of B and S impurities in an Fe \ensuremath{\Sigma}3[11\ifmmode\bar\else\textasciimacron\fi{}0](111) grain boundary are studied using the DMol molecular cluster method. A large cluster containing 91 atoms is used to simulate the local environment of the boundary. Optimized atomic…
Version 3.0 of the NIST/NASA/CARB Biological Macromolecule Crystallization Database (BMCD) includes crystal and crystallization data on all forms of biological macromolecules which have produced crystals suitable for X-ray diffraction studies. The data include summary information on each of the macromolecules, crystal…