Materials Literature
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A novel route to low‐cost processing of silicon carbide (SiC) layer structures is desribed. The processing involves pressureless liquid‐phase cosintering of compacted power layers of SiC, containing alumina (Al 2 O 3 ) and yttria (Y 2 O 3 sintering additives to yield and yttrium aluminum garnet (YAG) second phase. By…
The electronic structure and the optical properties of the organic superconductor \ensuremath{\kappa}-(BEDT-TTF${)}_{2}$Cu(NCS${)}_{2}$ are fully elucidated by means of first-principles self-consistent local-density calculation. The band effective masses on the Fermi surfaces are found to be ${\mathit{m}}_{\mathrm{\en…
The effects of high-energy irradiation on the structure, properties, and processing of polymers are of considerable scientific and commercial significance and have been reported in several books and review articles [101]. In this massive literature, two of the major radiation-induced changes reported are crosslinking…
Propagating fingerlike solitary waves are observed in an antiferroelectric liquid crystal on application of an electric field above a threshold field ${\mathit{E}}_{\mathrm{th}}$. On reducing the field below ${\mathit{E}}_{\mathrm{th}}$ the fingers recede, also as solitary waves. The velocity of the waves, which to ou…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of Soluble Poly(arylenevinylene)s Carrying Various Heterocycles as Arylene UnitsHiroki Saito, Shigeyuki Ukai, Shouji Iwatsuki, Takahito Itoh, and Masataka KuboCite this: Macromolecules 1995, 28, 24, 8363–8367Publication Date (Print):November 1, 1995Publication Hist…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of Organics on the Photodeposition of Copper in Titanium Dioxide Aqueous SuspensionsNancy S. Foster, Alice N. Lancaster, Richard D. Noble, and Carl A. KovalCite this: Ind. Eng. Chem. Res. 1995, 34, 11, 3865–3871Publication Date (Print):November 1, 1995Publication Hist…
Crystalline, submicrometer strontium ferrite powders, including SrFeO 2.97 , SrFe 2 O 4 , Sr 2 FeO 4 , Sr 3 Fe 2 O 6.16 , and SrFe 12 O 19 , were prepared by spray pyrolysis of an aqueous solution of mixed metal nitrates. The Sr:Fe mole ratio in the precursor solution was retained in the final products. Phase‐pure mat…
The effects of non-central forces in atomistic studies of grain boundaries in molybdenum and tungsten, the transition metals with half-filled d-band, are investigated. For this purpose we have used two different types of potential which include different number of moments of the local density of electronic states when…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermotropic Liquid Crystals of Main-Chain Polyesters Having a Mesogenic 4,4'-Biphenyldicarboxylate Unit. 6. Chiral Mesophases of Polyesters with a (S)-2-Methylbutylene SpacerJunji Watanabe, Manabu Hayashi, Atushi Morita, and Masatoshi TokitaCite this: Macromolecules 1995, 2…
Interfacial structure in the isotropic phase of a liquid-crystalline material near a wall is studied by a mean-field density-functional theory. With increasing strength of the wall anchoring potential, the theory predicts a first-order transition from incomplete to complete wetting by the smectic-A phase at bulk isotr…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReconsidering Random Copolymers at InterfacesScott T. Milner and Glenn H. FredricksonCite this: Macromolecules 1995, 28, 23, 7953–7956Publication Date (Print):November 1, 1995Publication History Published online1 May 2002Published inissue 1 November 1995https://pubs.acs.org/…
Renewed interest in absorption of H and D into transition metals has been stimulated by current work on metal‐hydride anodes for rechargeable batteries and by the intense interest in recently studied anomalous phenomena associated with absorption of D into Pd. One principal problem in this field is how site‐blocking e…
PURPOSE: This experimental study was designed to investigate the collagen fibrils of colonic anastomoses in rats and to compare normal healing with rats treated with biosynthetic growth hormone (bGH). METHODS: The healing zone of left colonic anastomoses was studied at days 2, 4, and 6 after surgery by means of scanni…
In this work we have studied the vibrational (relaxation) contributions beta(r) and gamma(r) to molecular nonlinear optical (nlo) properties of polyenovanillins, a class of push-pull molecules with increasing number n of conjugated CC bonds (n = 1, 3, 4, 5). Both experiments and ab initio calculations have been carrie…
The longitudinal (LA) and transverse (TA) Brillouin spectra along [001] phonon direction have been measured as a function of temperature (50–475 K) in single-crystal PbMg1/3Nb2/3O3 with scattering angles θs=180° and 32.5±0.2°. The Brillouin frequency shift with decreasing temperature shows a broad softening anomaly fo…
Several neutral solutes, ranging in size from methanol to a tetrasaccharide, stachyose, are shown to stabilize the left-handed Z form of the methylated polynucleotide poly(dG-m5dC). The action of these solutes is consistent with an osmotic stress, that is, with their effect on water chemical potentials coupled to a di…
We present an experimental study of the transformation avalanches taking place during a thermally induced thermoelastic martensitic phase transition of a Cu-Zn-Al alloy. We have studied the statistical distribution of amplitudes and durations of the acoustic emission signals released in the avalanches and found them t…
We introduce a mean field model that allows us to determine the interfacial behavior of AB random copolymers. Through this model, we calculate the reduction in interfacial tension \ensuremath{\gamma} that occurs when the random copolymers localize at the interface between immiscible homopolymers A and B. We also isola…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility and Thermal and Crystallization Behaviors of Poly(D-(-)-3-hydroxybutyrate)/Atactic Poly(methyl methacrylate) BlendsA. Siciliano, A. Seves, T. De Marco, S. Cimmino, E. Martuscelli, and C. SilvestreCite this: Macromolecules 1995, 28, 24, 8065–8072Publication Date (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and Properties of Poly(2,5-di-n-dodecyl-1,4-phenylene) Depending on Chain LengthT. F. McCarthy, H. Witteler, T. Pakula, and G. WegnerCite this: Macromolecules 1995, 28, 24, 8350–8362Publication Date (Print):November 1, 1995Publication History Published online1 May…