Materials Literature
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Substructure evolution has been studied by transmission electron microscopy in cyclically deformed copper polycrystals during conventional strain control testing and ramp loading. In both cases, and very similar to the substructure evolution previously reported for copper single crystals, dislocation structures develo…
Abstract Dehalogenation polycondensation of 4,7-dibromobenzimidazole and 4,7-dibromo-2,1,3-benzothiadiazole with a zero-valent nickel complex afford poly(benzimidazole-4,7-diyl) and poly(2,1,3-benzothiadiazole-4,7-diyl), respectively. These polymers give rise to electrochemically active doping-undoping cycles in both…
Humidity response characteristics of BaTiO 3 doped with lanthanum were examined using complex impedance measurements. A sample with relative density of 71% showed a nearly log‐linear increase of conductivity with humidity at 118 Hz. The average capacitance of bulk changed little with humidity; however, the resistance…
This article reports on chemical reactions and the properties they generated in artificial bone materials termed "organoapatites." These materials are synthesized using methodology we reported in the previous article of this series. Two different processes were studied here for the transition from organoapatite partic…
FT-IR microspectroscopy is used to compare the polymer and liquid crystal droplet regions within polymer-dispersed liquid crystal (PDLC) films. Thermoplastic polymer matrix PDLCs contain a higher amount of liquid crystal within the polymer regions than do thermoset polymer matrix films. IR functional group images of a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDistributions of chain ends and junction points in ordered block copolymersA. M. Mayes, R. D. Johnson, T. P. Russell, S. D. Smith, S. K. Satija, and C. F. MajkrzakCite this: Macromolecules 1993, 26, 5, 1047–1052Publication Date (Print):March 1, 1993Publication History Publis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTViscoelastic properties of amorphous polymers. 2. Anomalous temperature dependence of the steady-state recoverable compliance in low-molecular-weight polymersK. L. Ngai, D. J. Plazek, and C. A. BeroCite this: Macromolecules 1993, 26, 5, 1065–1071Publication Date (Print):Marc…
Abstract Oxidation of pyrrole yields a charged polymer film with incorporated anions. During the following reduction electroneutrality can be maintained by expulsion of these anions or by incorporation of cations. The contribution of both processes to the overall charge transport is found to depend strongly on the for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAluminum thiolate complexes of porphyrin as excellent initiators for Lewis acid-assisted high-speed living polymerization of methyl methacrylateTakato Adachi, Hiroshi Sugimoto, Takuzo Aida, and Shohei InoueCite this: Macromolecules 1993, 26, 6, 1238–1243Publication Date (Pri…
Two short VN bonds and a long NN bond, as well as a sodium atom that is situated in the cavity created by the VNNV unit and two mesityl (mes) ligands are the intriguing characteristics of the anion of complex 1. It is formed by the reduction of [V(mes)3(thf)] with Na under N2 and on protonation yields NH3 and N2H4.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGeochemical origins of sedimentary benzoporphyrins and tetrahydrobenzoporphyrinsTimothy D. LashCite this: Energy Fuels 1993, 7, 2, 166–171Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/do…
In order to find out the cathode material suitable to vacuum microelectronics devices, dependence of cathode material of field emitters was investigated with respect to the emission characteristics. Since the field emitters for vacuum microelectronics devices are fabricated by thin film processes, the characteristics…
Abstract Die Struktur und die Elektronendichte der closo ‐Bor‐Cluster B 4 X 4 (X = Br, I), B 6 X 6 2− (X = H, Cl, Br, I) und B 12 H 12 2− wurden mittels Pseudopotential‐Hartree‐Fock‐Rechnungen bestimmt. Die Interpretation der Bindungsverhältnisse erfolgte durch Auswertung der Elektronen‐Lokalisierungs‐Funktion (ELF).…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhthalocyanine aggregates on metal dichalcogenide surfaces: dye sensitization on tin disulfide semiconductor electrodes by ordered and disordered chloroindium phthalocyanine thin filmsL. K. Chau, C. Arbour, G. E. Collins, K. W. Nebesny, P. A. Lee, C. D. England, N. R. Armstr…
<div class="htmlview paragraph">Ceria has become an increasingly important component in automotive exhaust catalysts over the past decade. Recently, with the proposal that measurements of oxygen storage be used for the on-board evaluation of catalyst performance for both low emission vehicles (LEV) and non-LEV v…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGas permeation and selectivity of poly(organophosphazene) membranesHarry R. Allcock, Constance J. Nelson, William D. Coggio, Ian Manners, William J. Koros, David R. B. Walker, and Luiz A. PessanCite this: Macromolecules 1993, 26, 7, 1493–1502Publication Date (Print):March 1,…
Dense ceramics of Pb(Fe 1/2 Nb 1/2 )O 3 with high resistivity were fabricated below 1000°C by making use of the hot-pressing technique. For these hot-pressed specimens, measurements of the spontaneous polarization, dielectric constants, electromechanical coupling factors, piezoelectric constants and elastic compliance…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Yalda Farhoudi, Alejandro D. Rey; Shear flows of nematic polymers. I. Orienting modes, bifurcatio…
The central gallium(III) ion propagates the pairwise ferromagnetic exchange interactions between the S = 1/2 ligands in the title complex 1, which lead to an S = 3/2 ground state, as magnetic susceptibility measurements of 1 have shown. These types of complexes are important for the design of molecular ferromagnets. 3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSpecific molecular recognition via multipoint hydrogen bonding ubiquinone analogs - porphyrin having four convergent hydroxyl groups pairingTakashi Hayashi, Takashi Miyahara, Naomichi Hashizume, and Hisanobu OgoshiCite this: J. Am. Chem. Soc. 1993, 115, 5, 2049–2051Publicati…