Materials Literature
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Semiconductor crystals possessing inversion symmetry (Si, Ge) are known to have a rather weak second-order nonlinearity of the quadrupole type [ Phys. Rev. Lett.51, 1983 ( 1983)], since the electric-dipole contribution is forbidden by symmetry. We report the experimental observation of anomalously highly efficient sec…
For a number of different structures and states of B3, B2N, BN2, and N3, optimum geometries and harmonic spectra were obtained at the HF/6-31G* level. The relative stability of the isomers was determined using full fourth-order Mo/ller–Plesset theory, both with and without spin projection, as well as coupled cluster m…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpontaneous formation of superhelical strandsHiroshi Yanagawa, Yoko Ogawa, Hiroyuki Furuta, and Katsushige TsunoCite this: J. Am. Chem. Soc. 1989, 111, 13, 4567–4570Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June 19…
An experimental study has been made of the growth and collapse of a bubble near a composite surface consisting of two viscoelastic materials. The migratory characteristics of the bubble are examined by means of streak photography. The bubble migration depends not only on the properties of the composite surface but als…
Abstract Previous studies of the defect structure of kaolinite have examined samples having a restricted level of defects. This study examined nine kaolinite samples having a large diversity of defect contents, as indicated by Hinckley indexes ranging from 1.44 to 0.18. The samples were chosen so as to cover this rang…
This paper deals with some numerical aspects of the solution of continuum mixture model equations for analyzing solid-liquid phase change problems involving binary materials. It is found that the procedure used for iteratively updating the solid fraction with temperature has an important bearing on the convergence beh…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermal decomposition of methanol absorbed on palladium{111}. A new reaction pathway involving methyl formationRobert J. Levis, Jiang Zhicheng, and Nicholas WinogradCite this: J. Am. Chem. Soc. 1989, 111, 13, 4605–4612Publication Date (Print):June 1, 1989Publication History…
The transformation of Azotobacter vinelandii UW with A. vinelandii 113 DNA resulted in the formation of rifampin-resistant colonies, 13% of which also inherited a previously unrecognized mutation in the respiratory NADH oxidase. These transformants produced colonies with a white-sectored phenotype after prolonged incu…
The observation of surface profiles on rubbed polymer films demonstrated that micro-grooves had been formed on the polymer surface. on the other hand, the infrared (I.R.) and U.V.-visible dichroic measurements of the rubbed polymer films have revealed that the polymer backbone chains are oriented parallel with the rub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEfficient reduction of dioxygen with ferrocene derivatives, catalyzed by metalloporphyrins in the presence of perchloric acidShunichi Fukuzumi, Seiji Mochizuki, and Toshio TanakaCite this: Inorg. Chem. 1989, 28, 12, 2459–2465Publication Date (Print):June 1, 1989Publication H…
The degradation mechanism for the low voltage cathodoluminescence of and phosphors in vacuum fluorescent displays has been investigated by mass spectrometer, field emission scanning electron microscope observation, Auger electron spectroscopy, and x‐ray photoelectron spectroscopy. It has been found that the decomposit…
Abstract X‐ray photoelectron spectroscopy was applied to characterize CuO–ZnO catalysts (Cu/Zn atomic ratio ≥ 1) prepared by thermal decomposition at 350°C in air of hydroxycarbonate precursors obtained by the coprecipitation method at constant pH. For the precursors, the surface Cu/Zn atomic ratios have, within exper…
Off-critical quenches of a two-dimensional system with a continuous, conserved order parameter are studied numerically. Domain growth and scaling are investigated by monitoring several measures of the morphology. For quenches within the mean-field spinodal, circular domains coarsen through an evaporation-condensation…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSonolysis of aqueous surfactant solutions: probing the interfacial region of cavitation bubbles by spin trappingAntonio E. Alegria, Yves Lion, Takashi Kondo, and Peter RieszCite this: J. Phys. Chem. 1989, 93, 12, 4908–4913Publication Date (Print):June 1, 1989Publication Hist…
Abstract A chemical polymerization of aniline is quenched at specific reaction time intervals and the amounts of unreacted aniline and formed p ‐aminodiphenylamine is observed. Oxidation of aniline to generate p ‐aminodiphenylamine is observed. Oxidation of aniline to generate p ‐aminodiphenylamine is the slow step in…
Abstract Picosecond time resolved luminescence is investigated of excitons localized by alloy potential fluctuations in CdS 1– x Se x . Time resolved luminescence spectra, as well as time decay curves and time integrated luminescence spectra of a CdS 0.36 Se 0.64 sample are fitted using a model in which transfer to lo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGlass-liquid transition and the enthalpy of devitrification of annealed vapor-deposited amorphous solid water: a comparison with hyperquenched glassy waterAndreas Hallbrucker, Erwin Mayer, and G. P. JohariCite this: J. Phys. Chem. 1989, 93, 12, 4986–4990Publication Date (Pri…
The effect of manganese substitution into the crystal structures of the main Portland cement clinker phases (3CaO.SiO2, 2CaO.SiO2, 3CaO.Al2O3, 2CaO.Fe2O3 y 4CaO.Al2O3.Fe2O3) has been studied by X-ray and analytical electron microscopy. In oxidizing conditions, the limit of solid solution in 3CaO.SiO2 is about 0.72 ±0.…