Materials Literature
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The effective transverse thermal conductivity of Si3N4 thin films is determined as a function of film thickness. Results indicate that the effective thermal conductivity behavior of Si3N4 thin films is similar to that exhibited by amorphous SiO2 films; that is, there is no significant difference between the thermal co…
Amorphous silicon oxynitride powder was synthesized by nitridation of high‐purity silica in ammonia at 1120°C. The resulting material was X‐ray amorphous, and its chemical characteristics were determined by X‐ray photoelectron spectroscopy (XPS) and 29 Si nuclear magnetic resonance (NMR). The XPS analysis showed a shi…
ABSTRACT This article describes the effect of various environmental conditions on the speed of freshwater diatoms. The diatoms display a wide distribution of cell speeds, from 0 to > 20 μm·s −l , as indicated by both the distribution of speeds within a cell population as well as the distribution of 1‐s interval spe…
Deep level transient spectroscopy was employed to investigate the effect of two different dopants (aluminum and silver) on the electronic states of ZnO varistors. The base composition was a typical commercial formulation, and specimens were prepared by the mixed oxide route. Two electron traps were detected: trap L 1…
Future environmental regulations will limit the volatile organic content of many coatings, including those used on the internal walls of aluminum (Al) cans. Thus, the coating industry is interested in rapid development and testing of new coatings. Commercial coating evaluation requires testing of a large number of sam…
Results of measurements in situ of electrostrictive strain, dielectric polarization, dielectric constant, and crystallographic parameters as functions of applied electric field in the temperature range 20–200 °C of Pb0.97La0.02(Zr0.66Ti0.11Sn0.23)O3 composition are reported. The antiferroelectric to ferroelectric phas…
Abstract The large contents of octahedral vacancies in published formulae of chlorite from hydrothermal systems and clastic sequences are shown to be largely caused by inclusion of other minerals. Verification is provided by analytical electron microscope (AEM) analyses of chlorite in pelitic rocks from the Gaspé Peni…
The Commission on Powder Diffraction of the IUCr has undertaken a round robin of Rietveld refinement with the aims of: (i) evaluating a cross section of currently used software; (ii) examining the range and effect of various strategies of refinement; (iii) assessing the precision and accuracy (spread) of the derived p…
Stable radical species (e.g. see Fig.) can form an alternative source of organic conducting materials. Suppressing the Peierls distortion and stabilizing the metallic state can be achieved by applying pressure or by developing materials with enhanced two and three‐dimensional interactions. Recent progress in the synth…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLamellar Thickness Distribution in Linear Polyethylene and Ethylene CopolymersL. Lu, R. G. Alamo, and L. MandelkernCite this: Macromolecules 1994, 27, 22, 6571–6576Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 Octob…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Heterodinuclear .mu.-Ethynediyl Palladium-Platinum Complexes with Isocyanides: Living Polymerization of Aryl IsocyanidesKiyotaka Onitsuka, Koichi Yanai, Fumie Takei, Takashi Joh, and Shigetoshi TakahashiCite this: Organometallics 1994, 13, 10, 3862–3867Publicati…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMorphological Investigation of UV-Curable Polymer-Dispersed Liquid-Crystal (PDLC) MaterialsAndrew J. Lovinger, Karl R. Amundson, and Don D. DavisCite this: Chem. Mater. 1994, 6, 10, 1726–1736Publication Date (Print):October 1, 1994Publication History Published online1 May 20…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of Water in Polyoxometalate-Catalyzed Oxidations in Nonaqueous Media. Scope, Kinetics, and Mechanism of Oxidation of Thioether Mustard (HD) Analogs by tert-Butyl Hydroperoxide Catalyzed by H5PV2Mo10O40Robin Damico Gall, Mahmoud Faraj, and Craig L. HillCite this: Inorg.…
A three-dimensional covalent network of N atoms possessing a fraction (${\mathit{n}}_{\mathit{r}}$/N) of r-fold-coordinated atoms will, in general, display percolation of rigidity at an average coordination number 〈r〉=2.4-0.4(${\mathit{n}}_{1}$/N), where ${\mathit{n}}_{1}$/N represents the fraction of onefold-coordina…
Abstract A new, well-ordered, thermally robust ethylene glycol intercalate of kaolinite was formed by refluxing the dimethyl sulfoxide intercalate of kaolinite (Kao-DMSO) with dry ethylene glycol (EG). This new phase (Kao-EG 9.4 Å) which is characterized by a d 001 of 9.4 Å is distinct from a previously reported ethyl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPlatinum-Promoted Catalysis by Ceria: A Study of Carbon Monoxide Oxidation over Pt(111)/CeO2Christopher Hardacre, R. Mark Ormerod, and Richard M. LambertCite this: J. Phys. Chem. 1994, 98, 42, 10901–10905Publication Date (Print):October 1, 1994Publication History Published o…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoarsening Effects on Microstructure Formation in Isopycnic Polymer Solutions and Membranes Produced via Thermally Induced Phase SeparationSeung-Won Song and John M. TorkelsonCite this: Macromolecules 1994, 27, 22, 6389–6397Publication Date (Print):October 1, 1994Publication…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteractions of an Electron-Rich Tetracationic Tentacle Porphyrin with Calf Thymus DNANancy E. Mukundan, Gabor Petho, Dabney W. Dixon, Min Sook Kim, and Luigi G. MarzilliCite this: Inorg. Chem. 1994, 33, 21, 4676–4687Publication Date (Print):October 1, 1994Publication Histor…