Materials Literature
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Stable aqueous colloidal platinum sols have been prepared by the citrate reduction of chloroplatinic acid. Particle size at the completion of the reaction was found to increase with increased heat input during reduction. The u.v.–visible spectrum of the platinum sols depends upon particle size up to 4 nm. A stirring–c…
The mechanical properties of chemically vapor‐deposited boron carbides (B 4 C) with varied B/C ratios were investigated as a function of composition. The maximum hardness, H, and fracture toughness, K 1c , were observed at an almost stoichiometric composition. For nonstoichiometric B 4 C (B/C>4), H and K 1c decreas…
Abstract The kinetics of K exchange were investigated in Ca‐saturated samples from the Ap horizon of an Evesboro soil from Delaware. Biphasic kinetics characterized the first‐order plots for K adsorption and desorption at 283 and 298K with the two simultaneous reactions being attributed to exchange sites with varying…
The effects of applied pressure on graphite and its intercalation compounds are reviewed emphasizing the relationship between structure and transport properties. It has long been recognized that high pressure plays a crucial role in the polymorphic phase transitions of graphite, notably in the graphite-diamond transfo…
(1984). Surface-stabilized ferroelectric liquid crystal electro-optics: New multistate structures and devices. Ferroelectrics: Vol. 59, No. 1, pp. 25-67.
The most recently developed diagnostic technique in metal-electrolyte and metal-gas interfaces adapts spontaneous Raman scattering and nonlinear optical generation, techniques normally applied to bulk media, to surface science investigation. For certain metallic surfaces, an enormous increase exists in the Raman (as m…
Meso-tetra(2,6-dichlorophenyl)porphinatoiron(III)chloride and meso-tetra(pentachlorophenyl)porphinatioiron(III)chloride, which resist µ-oxo dimmer formation and oxidative destruction, are found to be unusually efficient catalysts for high-turnover, high-yield alkene epoxidation and alkane hydroxylation.
Colloidal particles of CdS are produced by adding H2S to aqueous solutions of Cd(NO3)2(method 1) or rapid mixing of Na2S and Cd(NO3)2 solutions (method 2). Single crystals with cubic structure are obtained, their size being 50 and 20 Å, respectively. Type 1 particles are associated as dimers or trimers while type 2 pa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplexes of aluminum(III) with hydroxy carboxylic acidsRamunas J. Motekaitis and Arthur E. MartellCite this: Inorg. Chem. 1984, 23, 1, 18–23Publication Date (Print):January 1, 1984Publication History Published online1 May 2002Published inissue 1 January 1984https://pubs.acs…
"Directionally Solidified Materials for High Temperature Service." British Corrosion Journal, 19(4), pp. 154–155
Introduction. Glossary. Theory of structures and theory of probability. Part 1: Analytical methods. Random quantities and structural reliability. Models of external actions. Elastic structures. Plastic structures. Structural reliability and structural design. Part 2: Operative methods. Data statistics. Statistical ana…
Sonoluminescence (SL) is the name given to the light emitted when a liquid is cavitated in a particular (rather violent) manner. The appropriate cavitation conditions can be realized by using high intensity ultrasound, a spark discharge, a laser pulse, or by flowing the liquid through a Venturi tube. SL occurs in a wi…
Revue portant sur les applications de ces alliages a solidification rapide a partir des feuilles metalliques amorphes pour dispositifs magnetiques jusqu'aux composants consolides par metallurgie des poudres pour applications structurales; on passe aussi en revue les modeles mathematiques appropries au processus de sol…
A comprehensive summary is provided on the subject of heavy metal fluoride glasses. This includes discussions on glass compositions, preparation, structure, fiber drawing characteristics, and intrinsic and extrinsic optical properties. Other relevant glass and fiber characteristics such as strength, durability, and th…
XPS techniques have been used to characterize electrically conducting films of polypyrrole and polybithiophenes as grown electrochemically. These techniques have yielded information not only on the nature of the polymeric cation and its counter anion but also on the structural disorder in these polymers. In particular…
Abstract The structure and chemistry of thin solid films are best studied by transmission electron microscopy (TEM) when they are viewed in cross‐section—that is, when the surface normal of the film is made perpendicular to the electron beam. In this orientation, the substrate, the thin film layers, and the interfaces…
Hitherto unobtainable Raman solution data for [Ru3(CO)12], [Os3(CO)12], and [Ru4H4(CO)12] in the carbonyl stretching region are presented. The results were obtained by careful choice of solvent and specialist instrumentation. They are shown to confirm previous assignments, by examining the special vibrational properti…
We consider a lattice dynamics model of a straight screw dislocation moving in a simple cubic lattice with nearest-neighbour « snapping bonds ». The effect on the lattice of the dislocation motion is described by a dynamic source-force, or Kanzaki-force, and the lattice response by the phonon Green's function. A rando…
The first molecular weight determination for a pyrrole based conducting polymer indicates that poly(β,β′-dimethylpyrrole) consists of chains of up to ca. 1000 pyrrole units.
Soluble conducting poly(acetylene)–poly(isoprene) block copolymers have been synthesized by using the polymeric catalyst formed by the reaction of poly(isoprenyl-lithium) with tetrabutoxytitanium in toluene at room temperature; an instantaneous polymerization of acetylene is observed leading to the formation of a bloc…