Materials Literature
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Alkoxy‐substituted thiophenes have been shown to yield polymers with a reduced bandgap. An X‐ray investigation of two symmetrical pentoxy‐substituted 2,2′‐bithienyls is reported, and their structure and packing described. It is suggested that the extra rigidity and packing stability of the alkoxythiophene oligomers an…
This paper presents a method for the reliable extraction of structure-factor amplitude information from the least-squares integrated-intensity refinement of powder diffraction data. The inevitable overlap of Bragg reflections can lead to strongly correlated reflection intensities that can, in turn, produce unrealistic…
Conformational dynamics and relaxation of the torsional angle autocorrelation (ACF) function in bulk polybutadienes (PBD) have been studied over a wide temperature range via molecular dynamics simulations. All trans, all cis and 70 mol % trans were the configurations of the systems studied. Companion studies of these…
The coherent (111) twin boundary in BaTiO3 has been investigated using quantitative high-resolution transmission electron microscopy and spatially resolved electron-energy-loss spectroscopy (EELS). Lattice images under different defocusing conditions were obtained and compared with simulated images for different struc…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBrosted Acidity of a Superacid Sulfate-Doped ZrO2 SystemC. Morterra, G. Cerrato, F. Pinna, and M. SignorettoCite this: J. Phys. Chem. 1994, 98, 47, 12373–12381Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inissue 1 November…
A three-dimensional, electromechanical constitutive law has been formulated for electrostrictive ceramic materials. This fully coupled, phenomenological model relates the key state variables of stress, strain, electric field, polarization and temperature in a set of compact nonlinear equations. The direct and converse…
We have performed measurements of the surface impedance in the normal and superconducting states of the title compounds in the millimeter wave-frequency range (1--3 ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}1}$), and have evaluated the complex conductivity for different crystallographic orientations. Above the transition…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGe93- and Pb93-: Two Novel, Naked, Homopolyatomic Zintl Ions with Paramagnetic PropertiesThomas F. Faessler and Markus HunzikerCite this: Inorg. Chem. 1994, 33, 24, 5380–5381Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published inis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical Polymerization of Pyrrole-Containing Self-Assembled Alkanethiol Monolayers on AuRobert J. Willicut and Robin L. McCarleyCite this: J. Am. Chem. Soc. 1994, 116, 23, 10823–10824Publication Date (Print):November 1, 1994Publication History Published online1 May 2…
Abstract The interactions between poly(ethylene terephthalate) (PET) and six high temperature solvents are discussed in terms of gelation and melting temperature depression. The six solvents are 1′‐acetonaphthone (AN), phenyl ether (PE), biphenyl (BP), 1‐methyl naphthalene (MN), nitrobenzene (NB), and a eutectic mixtu…
This paper summarizes the results of studies, coupled with a series of tests, that investigated rigid-body projectiles (penetrators) at high (up to 5500 ft/sec) velocities.Before these studies, it had been hypothesized that a velocity limit would be reached at which increasing the velocity would not commensurately inc…
In electron and ion beam lithography, the particle–particle interaction in the drift length of the system imposes a fundamental limitation on the useful current obtainable for a given resolution. This is a classical N-body problem, for which Monte Carlo simulation has proven useful for predicting the size of the effec…
Austenitic type 304 (UNS S30400) stainless steel is susceptible to stress corrosion cracking (SCC) in acidic chloride (Cl–) solutions at ambient temperature. In this study, a layer of adsorbed product film enriched in chromium and nickel was found to form on the metal surface in the solutions. This product film had a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemical Intercalation of Oxygen in La2NiO4+x: Phase Separation below Ambient TemperatureI. Yazdi, S. Bhavaraju, J. F. DiCarlo, D. P. Scarfe, and A. J. JacobsonCite this: Chem. Mater. 1994, 6, 11, 2078–2084Publication Date (Print):November 1, 1994Publication History P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDisjoining Pressure of Thin Nonfreezing Water Interlayers between Ice and Silica SurfaceN. V. Churaev, S. A. Bardasov, and V. D. SobolevCite this: Langmuir 1994, 10, 11, 4203–4208Publication Date (Print):November 1, 1994Publication History Published online1 May 2002Published…
A recombinant strain of Escherichia coli , which overexpressed phaC and phaE from Chromatium vinosum , was used to isolate poly(3‐hydroxyalkanoic acid) synthase. The isolation was performed by a two‐step procedure including chromatography on DEAE‐Sephacel and Procion Blue H‐ERD. The poly(3‐hydroxyalkanoic acid) syntha…
A theoretical survey of lattice defects including transformation twins due to a structural transformation is presented for Mn3O4 hausmannite. Room-temperature transmission electron microscopy observations of synthetic samples reveals that accommodation twins are present, associated with the structural transition. Two…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTZirconium Dioxide Supported on .alpha.-Cellulose: Synthesis and CharacterizationUbirajara P. Rodrigues Filho, Yoshitaka Gushikem, Fred Y. Fujiwara, Sandra C. de Castro, Iris C. L. Torriani, and Leide Passos CavalcantiCite this: Langmuir 1994, 10, 11, 4357–4360Publication Dat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEvaluation and Application of Isokinetic Relationships: The Thermal Decomposition of Solids under Nonisothermal ConditionsSergey Vyazovkin and Wolfgang LinertCite this: J. Chem. Inf. Comput. Sci. 1994, 34, 6, 1273–1278Publication Date (Print):November 1, 1994Publication Hist…
Alumina/ceria‐stabilized zirconia bars tested in four‐point bending exhibited deformation bands on the tensile side due to localized tetragonal‐to‐monoclinic transformation. These bands became increasingly darker and were fully visible some weeks after the bending experiment. XPS spectra revealed that the darker regio…