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。
We present an analysis of crystal growth of a pure material from its melt, using a phase field model. This model for a first-order phase transition couples nonconserved order parameter kinetics to thermal diffusion. It has been shown to give unique one-dimensional solutions, with velocity selection. We demonstrate tha…
Polyfunctional silanes were designed to promote the formation of a stable multisilane layer on the silica surface. The hydrolytic stability of polyfunctional silanes at the interface between silica and polymeric resin was investigated using conventional tensile testing. The specimens were immersed in boiling water and…
A fundamental understanding of pancake reactors is necessary for the establishment of process‐property relationships in these systems. Here, a mathematical model of the gas flow, transport phenomena, and growth rate profiles of epitaxial silicon in a pancake reactor is presented and the resulting modeling equations ar…
One of the best one-dimensional small organic conductors is the perchlorate 1 (σ ≤ 677 S cm−1). The corresponding triiodide displays weak metallic conduction; the insulator transition at 45 K is distinctly lower than for TTF-TCNQ. The donor, 1,3,6,8-tetrakis(methylthio)pyrene is easily synthesized in large amounts.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBranching ratios in atomic oxygen (3P) reactions of terminal olefins studied by kinetic microwave absorption spectroscopySeiichiro Koda, Yasuki Endo, Soji Tsuchiya, and Eizi HirotaCite this: J. Phys. Chem. 1991, 95, 3, 1241–1244Publication Date (Print):February 1, 1991Public…
<div class="htmlview paragraph">ϵ-caprolactam was polymerized in the interlayer space of montmorillonite, the clay mineral yielding a nylon-clay hybrid (NCH). X-ray and TEM measurements revealed that each template of the silicate, which was 1 nm thick, was dispersed in the nylon 6 matrix, and that the interlayer…
The density and refractive index variation with temperature in N(p-n-butoxybenzylidene)p-n-alkylanilines viz., 40.m compounds for m = 4 to 12 are presented. The density, thermal expansion coefficient and the refractive index results infer first order character for IN, AB and CB transitions and a second order character…
Isocyanide and chelate complexes have medical implications. Chelate complexes containing di- and triisocyanide could not, however, be synthesized in the past because of the extreme ring strain in the almost linear MC NR unit. With novel triisocyanide ligands (1 (sketched on the right), and (N(CH2CH2CH2NC)3) an only…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA new tetranuclear chromium(III) complex with a [Cr4O2] core: synthesis, structure, and magnetic properties of [Cr4O2()2CCH3)7(bpy)2]PF6 (bpy = 2,2'-bipyridine)Avi Bino, Ruthie Chayat, Erik Pedersen, and Andreas SchneiderCite this: Inorg. Chem. 1991, 30, 4, 856–858Publicatio…
SUMMARY Current scanning electron microscopes, equipped with field emission guns and high‐performance immersion lenses, can achieve spatial resolutions of the order of 1 nm in both secondary and backscattered imaging modes over a wide range of operating energies. The generation and interpretation of images with nanome…
Crack resistance characteristics and fatigue properties have been studied in four types of Y 2 O 3 –TZP ceramics including one containing Al 2 O 3 . The largely linear‐elastic behavior connected with the very small transformation zone (<5 μm) explains the absence of any resistance‐curve behavior and the flaw‐contro…
Two configurations of the phase compensation method are presented to measure the cell gap of a filled twisted nematic liquid crystal display (TN-LCD). The twist angle of the TN-LCD can be any value between 0° and 360° and the pretilt angle can be any practical value. The cell gap measured by this method is the true TN…
Octa(dodecyl)etrapyrazinoporphyrazine (C12)8PzH2 the corresponding metal (II) complexes (C12)8PzM3M: Cu, Ni, Co, octa(2-ethylhexyl)tetrapyrazinoporphyrazine (2-EtC6)8PzH2 and the corresponding copper (II) complex (2-EtC6)8PzCu have been synthesized and their liquid crystalline states characterized. These properties ha…
Biofilm formation on 304 stainless steel (S30400) does not necessarily result in an ennoblement of the corrosion potential. Instead, biofilms composed of aerobic and anaerobic bacteria from Gulf of Mexico water formed an anaerobic biofilm/metal interface and caused the corrosion potential to move in the negative direc…
A new series of optically active dipole dopants - diesters of 4,4″-terphenyl dicarboxylic acid - have been prepared. Most of the components are high melting substances. Some of 2-chlorine substituted compounds show a chiral smectic C* phase. The Ps value induced by optically active dipole dopants depends on several fa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLiquid-crystalline polyethers based on conformational isomerism. 16. Hexagonal columnar phase (.PHI.h) in a nondiscotic copolyether based on 1,2-bis(4-hydroxyphenyl)ethane, 1,8-dibromooctane, and 1,12-dibromododecane, and the novel 2-dimensional-3-dimensional .PHI.h-sB trans…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of silver ionic clusters and silver metal particles in zeolite rho studied by electron spin resonance and far-infrared spectroscopiesBo Xu and Larry KevanCite this: J. Phys. Chem. 1991, 95, 3, 1147–1151Publication Date (Print):February 1, 1991Publication History Pu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpectroscopic investigations of specific interactions in amorphous polymer-polymer blends: poly(vinylphenol) and poly(vinyl methyl ketone)Chuan Qin, Alfredo T. N. Pires, and Laurence A. BelfioreCite this: Macromolecules 1991, 24, 3, 666–670Publication Date (Print):February 1…
<div class="htmlview paragraph">The three-dimensional non-reacting flow field inside a typical dual-monolith automotive catalytic converter was simulated using finite difference analysis. The monolithic brick resistance was formulated from the pressure gradient of fully developed laminar duct-flow and corrected…
An electrochromic window was built using WO 3 as electrochromic material and V 2 O 5 as counterelectrode. Both were deposited onto ITO‐coated glass panes by vacuum evaporation and were amorphous to x‐ray diffraction. The electrolyte was a lithium‐conducting polymer consisting of a poly(ethylene oxide)‐lithium salt com…