Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanism for the Formation of Chloromethyl Branches in Poly(vinyl chloride)W. H. Starnes Jr., F. C. Schilling, K. B. Abbås, R. E. Cais, and F. A. BoveyCite this: Macromolecules 1979, 12, 4, 556–562Publication Date (Print):July 1, 1979Publication History Published online1 Ma…
On account of self-similarity of the Gaussian function under Fourier transformation, the lattice energy of the Gaussian core model at absolute-zero temperature exhibits duality relations. In the cases of one and two dimensions the duality involves high- and low-density pairs for the single stable lattice structure. In…
Alkaline earth fluoride crystals doped with trivalent rare earth contain both isolated and clustered rare earths. Electronic nonradiative relaxation for isolated rare earths proceeds solely by multiphonon relaxation while for clustered rare earths, it proceeds by both efficient nonresonant energy transfer and multipho…
The temperature dependence of cathodoluminescence intensity and decay time in the range 10°–480°K is reported for both nominally pure and Ce 3+ ‐doped yttrium aluminum garnet (YAG) crystals. Luminescence from characteristic lattice defect levels and from the 2 D excited state of the Ce 3+ impurity have both been inves…
The effects of radiation sterilization on ultrahigh molecular weight polyethylene were explored by freeze fractures, electron spin resonance, absorption of aqueous media, density measurements, small-angle and wide-angle x-ray scatter, differential scanning calorimetry, infrared and ultraviolet-visible spectrometry, st…
The presence of Fe(CN)6(-4) provides sequential, one-electron reduction pathways for OSO4. An equilibrium is established containing OSO4, Fe(CN)6(-4), Fe(CN)6(-3), OSO2(OH)4(-4), and labile cyano-bridged OS-Fe species containing Os in nominal oxidation states of VIII, VII, and VI. These osmium complexes are chelated b…
Arterial prostheses seeded with autogenous vascular endothelium demonstrate a well-organized, cellular, inner lining. To determine the nature of the lining cells, six animals underwent replacement of the infrarenal aorta with Dacron prostheses. During the preparation of three such grafts, endothelium was scraped from…
Stress corrosion studies have been conducted with Type 304 stainless steel using a variety of electrochemical techniques at elevated temperatures. The object of these studies was to determine material response in simulated boiling water reactor environments. Anodic polarization curves and straining electrode experimen…
A model of current transport in ZnO varistors is proposed. The model is a modification of an earlier one suggested by Levine, with the major difference being the inclusion of a thin (?10 Å) ’’disordered’’ layer which separates the single-crystal ZnO grains. The proposed model is shown to be consistent with electrical…
Part one discusses the corrosion of copper and its alloys, including atmospheric corrosion, oxidation, corrosion by other gases, aqueous and nonaqueous corrosion, stress-corrosion cracking, erosion, radiation, underground corrosion and purposeful corrosion. Part two treats the corrosion of tin and its alloys including…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Basis for Miscibility in Polyester-Polycarbonate BlendsC. A. Cruz, J. W. Barlow, and D. R. PaulCite this: Macromolecules 1979, 12, 4, 726–731Publication Date (Print):July 1, 1979Publication History Published online1 May 2002Published inissue 1 July 1979https://pubs.acs.o…
Abstract The adsorption of Mn 2+ on two samples of powdered calcite with different surface areas has been studied using atomic absorption and electron spin resonance spectroscopy to investigate the solution and mineral phases. Chemisorption of Mn 2+ on CaCO 3 surfaces lowered the solubility of Mn 2+ below the level ex…
Metal catalysts are technologically very important. Moreover, these materials are intriguing systems for scientific investigation. In general, metal catalysts are highly dispersed materials, i.e., materials with very high surface areas. The study of these materials with chemical probes including chemisorption and sele…
Electrons incident on a crystal surface can be temporarily trapped in surface states at energies above the vacuum level. These temporary or nonstationary surface states are observed as narrow fluctuations of elastic scattering intensity with respect to variation of electron energy and incidence direction. The scatteri…
The first complex to contain the bidentate ligand [H N O]2− has been isolated and characterized. MoVI oxo anions react with hydroxylamine and terpyridine (tpy)to give a yellow cation (1) which can be isolated as the perchlorate. The red neutral complex (2) is formed reversibly from (1) and cyanide.
Various aspects are covered including the basic CVD process, the range of materials produced, the chemistry of CVD, properties of CVD deposits, comparison with other coating techniques, applications and future developments
The decay of recombination luminescence intensity I with time t, given by the Debye–Edwards law I ∝ t−m, with m?1 and time independent, applies to Coulombically correlated charge pairs in rigid low-dielectric media. For observation times much greater than preparation times it is remarkably successful, e.g., for a rang…
Nonlinear magnetization waves are investigated in antiferromagnets with anisotropies of the “easy axis” type in an external magnetic field. Solitary waves are found, and the motion of the domain boundary at a moderate velocity is investigated. Exact solutions are found which describe the interaction of the nonlinear s…
The Debye-Waller factor of cubic CsPbBr 3 was investigated by neutron diffraction technique at 152°C. The perovskite structure model with anisotropic thermal vibrations can explain the characteristics of the thermal behavior of this substance, which turned out to be essentially the same as that of CsPbCl 3 ; that is,…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-ray photoelectron spectra of N-methyltetraphenylporphyrins: evidence for a correlation of binding energies with metal-nitrogen bond distancesDavid K. Lavallee, John Brace, and Nicholas WinogradCite this: Inorg. Chem. 1979, 18, 7, 1776–1780Publication Date (Print):July 1, 1…