Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydroxylation of polyisoprene via addition of haloacetic acids to the double bondYoung H. Kim and Ashish PandyaCite this: Macromolecules 1991, 24, 24, 6505–6511Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue 1 November…
Abstract Linear low density polyethylenes are manufactured by copolymerizing ethylene with 1‐alkenes, yielding a linear polyethylene backbone with short side chains. Due to the nature of the catalyst used in the polymerizaton, multimodal branching distributions are typically obtained. In this report, we have investiga…
LEED I(V) data comprising three non-degenerate beams have been collected at normal incidence from the cleaved (001) surface of TiO 2 . Care has been taken to minimize the effects on the I(V) data of electron beam damage to the surface. Analysis of the I(V) data has been carried out using tensor LEED theory and a searc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMelting and recrystallization during mesophase transitions of a thermotropic liquid crystalline polymerJoonhyun Nam, Tomohiro Fukai, and Thein KyuCite this: Macromolecules 1991, 24, 23, 6250–6253Publication Date (Print):November 1, 1991Publication History Published online1 M…
Magnetic properties of polycrystalline thin films of chromium chalcogenide spinels, i.e., ${\mathrm{CdCr}}_{2}$${\mathrm{Se}}_{4}$ lightly doped with indium and ${\mathrm{CdCr}}_{2\mathit{x}}$${\mathrm{In}}_{2\mathrm{\ensuremath{-}}2\mathit{x}}$${\mathrm{Se}}_{4}$, are studied. The ferromagnetic- and spin-wave-resonan…
Temperature dependence of magnetocrystalline anisotropy was measured for Co-Ti-Sn substituted Ba ferrite particles, to clarify the origin of a small temperature dependence of coercivity (dHc/dT) for this material. For comparison, the same measurement was carried out for Co-Ti substituted particles which have positive…
The RESRAD code is a pathway analysis code that is designed to calculate radiation doses and derive soil cleanup criteria for the US Department of Energy's environmental restoration and waste management program. the RESRAD code uses various pathway and consumption-rate parameters such as soil properties and food inges…
Using high-resolution electron beam lithography, we have fabricated metal–semiconductor–metal photodetectors with sub-50 nm finger spacing and finger width on GaAs grown by molecular beam epitaxy, which are, to our knowledge, the smallest ever reported. dc measurements showed that they have low dark current and high s…
Abstract We investigated soil mineral weathering sequences in three geologically distinct high‐elevation areas of southern Appalachian spruce‐fir ( Picea rubens Sarg.‐ Abies fraseri [Pursh.] Poir) forests in order to elucidate the pedogenic factors that distinguish these unique soils from their low‐elevation counterpa…
Abstract α‐Methyleniedane (MI), a cyclic analog of α‐methylstyrene which does not undergo radical homopolymerization under standard conditions, was synthesized and subjected to radical, cationic, and anionic polymerizations. MI undergoes radical polymerization with α,α′‐azobis(isobutyronitrile) in contrast to α‐methyl…
The time evolution of Debye-Scherrer lines was investigated in metal-tritium-helium systems by neutron-scattering techniques. Polycrystalline samples of ${\mathrm{TaT}}_{\mathit{x}}$, ${\mathrm{YT}}_{\mathit{x}}$, and ${\mathrm{ScT}}_{\mathit{x}}$ were measured over a period of three years. The results show that heliu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical and spectroelectrochemical studies of tin(II) porphyrinsK. M. Kadish, D. Dubois, J. M. Barbe, and R. GuilardCite this: Inorg. Chem. 1991, 30, 24, 4498–4501Publication Date (Print):November 1, 1991Publication History Published online1 May 2002Published inissue…
The interface between a solid and a liquid or two dissimilar solids poses a resistance to heat transport by phonons, which are quanta of lattice vibrational energy. The classical theory explains that the resistance R arises due to a mismatch in acoustic impedances of the two media and predicts R to vary with temperatu…
The results of Molecular Dynamics simulations of borate glass (B2O3) using three-particle interactions are presented. These calculations yield a glass consisting of randomly connected BO3 triangles. Infrared and Raman spectra have been calculated and compared with experimental spectra. The calculated infrared spectra…
A discrete energy loss feature has been observed after adsorption of small amounts of potassium on graphite at 90 K, the frequency of which increases markedly from about 50 meV at the lowest potassium coverage to 320 meV at a coverage of 0.1 ML. This feature is attributed to a surface plasmon mode. The shift in plasmo…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSET photochemistry of flavin-cyclopropylamine systems. Models for proposed monoamine oxidase inhibition mechanismsJong Man Kim, Michael A. Bogdan, and Patrick S. MarianoCite this: J. Am. Chem. Soc. 1991, 113, 24, 9251–9257Publication Date (Print):November 1, 1991Publication…
A dynamic peak-to-peak strain of 2440 p.p.m. has been measured at resonance in a Terfenol-D transducer which exceeds the 1600 p.p.m. static magnetostrain by 50%. This experimental result is in good agreement with theoretical calculation. It shows that static magnetostrain is not a real limit for dynamic strains at res…
Grain‐size distribution in various Al 2 O 3 ─ZrO 2 (2.5 mol% Y 2 O 3 ) ceramics during high‐temperature annealing was examined. In alumina‐rich alloys, the grain size of major and minor phases was very different, while grain size was almost uniform in zirconia‐rich alloys. This difference in grainsize distribution was…
The wall recombination coefficient (γ) of several materials for atomic oxygen was measured introducing a new method based on the NO*2 continuum in a discharge-flow system. This method has many advantages, such as the ability of measuring γ under different pressures, nonessentiality of measuring absolute atom concentra…
Films of polytetrafluoroethylene (PTFE) and perfluorinated copolymers (PFA and FEP), with a range of fabrication histories, were exposed to sodium naphthalenide (Na/naphth) etchant so as to defluorinate the surface for improved wettability, and hence adhesion. The depth of defluorination was measured gravimetrically a…