Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMonte Carlo Simulations on the Stereoregularity, Crystallinity, and Related Physical Properties of Poly[methyl-(3,3,3-trifluoropropyl)siloxane]Tarek M. Madkour and J. E. MarkCite this: Macromolecules 1995, 28, 20, 6865–6870Publication Date (Print):September 1, 1995Publicatio…
Polarization-selective gratings in the resonance domain of diffractive optics are calculated by use of rigorous electromagnetic diffraction theory. The polarizing effects are attained by special surface-relief structures, and the profile of binary surface-relief gratings is optimized with a nonlinear Newton algorithm…
Abstract Kusachiite, CuBi 2 O 4 , has been found in a calcite vein cutting gehlenite-spurrite skarns at Fuka, Okayama Prefecture. It is associated with calcite, henmilite, sillenite, bakerite, tenolite, bultfonteinite, apophyllite, cuspidine and thaumasite. Kusachiite occurs as prismatic crystals or globular aggregate…
X-ray scattering studies on a homologous series of thermotropic liquid crystals with one tail perfluorinated reveal that the smectic layer thickness depends only on the length of the fluorocarbon tail. Density measurements in combination with the x-ray results show that the average cross-sectional area per molecule, p…
Reaction of pyridine with 1-bromoalkanes leads to N-alkylpyridinium bromides which can be further reacted with silver dodecylsulphate to give N-alkylpyridinium dodecylsulphates in good yield. These salts are mesomorphic and their mesophases have been characterized by optical microscopy, DSC and X-ray scattering techni…
DC testing of solid dielectric insulated cables has been shown to have limited usefulness. Currently, the two VLF test techniques, the author has found, seem to be the most promising alternatives for testing service-aged power cable systems with extruded dielectric insulation.>
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSurface acidity of pillared taeniolites in terms of their proton affinity distributionsTeresa J. Bandosz, Jacek Jagiello, and James A. SchwarzCite this: J. Phys. Chem. 1995, 99, 36, 13522–13527Publication Date (Print):September 1, 1995Publication History Published online1 Ma…
The charge-transfer (CT) complexes of a series of 4,4,5,5-tetramethylimidazolin-1-oxyls substituted with 4-(N-alkylpyridinium) groups at the 2-position with two radical anions, tetrafluorotetracyanoquinodimethanide (TCNQF4–) and hexacyanobutadienide (HCBD–) were prepared and their magnetic properties were investigated…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric Relaxation of Dipole-Inverted cis-Polyisoprene SolutionsHiroshi Watanabe, Hirofumi Yamada, and Osamu UrakawaCite this: Macromolecules 1995, 28, 19, 6443–6453Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1…
High resolution transmission electron microscopy is used to study the atomic structure of a Σ7 grain boundary (Σ is equal to the reciprocal of the fraction of lattice sites in coincidence) in Al2O3. This grain boundary in Al2O3 has misorientation [0111]/180°. The grain boundary plane is (0112)1∥(0112)2. Four possible…
A transparent film of polycarbonate is conducting when it contains long and thin needles of the organic conductor (TSeT)2Cl. Film conductivity of the order of 1 S/cm can be achieved with a content as low as 0.5 vol % of the conducting charge-transfer complex, provided that the needles are obtained by in situ complexat…
Diamondlike carbon films have been prepared by RF bias electron cyclotron resonance (ECR) microwave plasma deposition from ethylene gas. The relationship between the properties of diamondlike carbon films and process parameters has been investigated. These films were evaluated in terms of Knoop hardness, Raman spectro…
The crystal structures of 88 and 79% relative humidity forms of ribonuclease A, resulting from water-mediated transformations, have been refined employing the restrained least-squares method using X-ray data collected on an area detector to R = 0.173 for 15 326 observed reflections in the 10-1.5 A resolution shell and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffect of CO2 on the Performance of Au/MnOx and Pt/SnOx Low-Temperature CO Oxidation CatalystsGar B. Hoflund, Steven D. Gardner, David R. Schryer, Billy T. Upchurch, and Erik J. KielinCite this: Langmuir 1995, 11, 9, 3431–3434Publication Date (Print):September 1, 1995Publica…
The morphology of crack fronts stopped during their propagation at pinning microstructural obstacles in two different metallic alloys is analysed, and their "in-plane" roughness index is determined for the first time. In the case of the 8090 Al-Li alloy, which has a very anisotropic microstructure, the roughness of th…
Abstract Takedaite, Ca 3 B 2 O 6 , has been found in crystalline limestone near gehlenite−spurrite skarns at Fuka, Okayama Prefecture. It occurs as aggregates of granular crystals up to 0.8 mm long and 0.3 mm wide. The mineral is associated with nifontovite, olshanskyite, pentahydroborite, frolovite, sibirskite, calci…
The solid‐state reaction; was conducted between 1458 and 1719 K in air . The reaction obeyed the parabolic rate law and the diffusion of yttrium ion controlled the reaction.According to Wagner's theory, the diffusion coefficient of yttrium ion Y 3+ in was evaluated using the Gibbs free energy change of the reaction an…
In this paper we report the first hyperpolarizabilities (beta) of 12, sulfophthalein dyes. Since these dyes are ionic in nature, their second-order nonlinearities were measured by the hyper-Rayleigh scattering technique in solution. The measured beta values are large and highly solvent dependent. Inclusion of solvent…
High‐purity, chemically prepared barium titanate was doped with 0.3 at.% lanthanum and, in some cases, counterdoped with 0.04 at.% manganese by precipitation. Using standard techniques, tape‐cast sheets of the positive temperature coefficient of resistance (PTCR) compositions as well as the base insulating powder were…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLayer-by-Layer Construction of SiOx Film on Oxide SemiconductorsHiroaki TadaCite this: Langmuir 1995, 11, 9, 3281–3284Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://pubs.acs.org/doi/10.1021/la…