Materials Literature
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The range of validity and the accuracy of scalar diffraction theory for periodic diffractive phase elements (DPE’s) is evaluated by a comparison of diffraction efficiencies predicted from scalar theory to exact results calculated with a rigorous electromagnetic theory. The effects of DPE parameters (depth, feature siz…
Measurements of the magnetic moment and susceptibility of diamond, graphite along and perpendicular to the c axis, ${\mathrm{C}}_{60}$, and carbon nanotubes are reported as a function of magnetic field (0H55 kOe) and temperature (4.5 KT310 K). The data on ${\mathrm{C}}_{60}$ are diamagnetic, confirm previous results,…
Polarizabilities and hyperpolarizabilities and their frequency dispersions are calculated for para-nitroaniline immersed in solution using a reaction field response model. Single- and multiconfigurational wave functions are self-consistently optimized in the presence of the reaction field of the solvent and used as re…
Composition and temperature of ferroelectric La-doped lead zirconate titanate ceramics influence its electric fatigue behavior, defined as the degradation of the electrical properties under the action of an ac field applied for a long time. Compositions of rhombohedral symmetry exhibit little or no fatigue compared wi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Properties of Novel Water-Soluble Conducting Polyaniline CopolymersMy T. Nguyen, Paul Kasai, James L. Miller, and Arthur F. DiazCite this: Macromolecules 1994, 27, 13, 3625–3631Publication Date (Print):June 1, 1994Publication History Published online1 May 2002P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Characterization of the Cu+/ZSM-5 Catalyst and Its Reaction with NO under UV Irradiation at 275 K. In situ Photoluminescence, EPR, and FT-IR InvestigationsMasakazu Anpo, Yasushi Shioya, Hiromi Yamashita, Elio Giamello, Claudio Morterra, Michel Che, Howard H.…
We present microscopic observations of the diffusion in water of micrometer-sized spheres confined between two walls. Deviations from the Stokes-Einstein law are observed, which for different bead diameters and different separations between the walls depend on a single dimensionless parameter. We compare numerical pre…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystalline .beta.-Cyclodextrin Hydrate at Various Humidities: Fast, Continuous, and Reversible Dehydration Studied by X-ray DiffractionThomas Steiner and Gertraud KoellnerCite this: J. Am. Chem. Soc. 1994, 116, 12, 5122–5128Publication Date (Print):June 1, 1994Publication H…
Abstract The crystal structure of Fe 4 Al 13 was refined using single crystal diffractometer data: Pearson symbol mC102, space group C 2/ m ; a = 15.492(2) Å, b = 8.078(2) Å, c = 12.471(1) Å, β = 107.69(1)°; R F = 0.053, R F ( w ) = 0.044 for 1127 reflections and 137 refined parameters. The coordination numbers of ato…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNanoscale Tubular Ensembles with Specified Internal Diameters. Design of a Self-Assembled Nanotube with a 13-.ANG. PoreNina Khazanovich, Juan R. Granja, Duncan E. McRee, Ronald A. Milligan, and M. Reza GhadiriCite this: J. Am. Chem. Soc. 1994, 116, 13, 6011–6012Publication D…
The growth of ${\mathrm{PbTiO}}_{3}$ films by a metalorganic chemical-vapor-deposition technique has resulted in three-dimensionally epitaxial heterostructures on various single-crystal substrates. These heterostructures consist of ${\mathrm{PbTiO}}_{3}$ films on the (001) surface of the single crystals: potassium tan…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the Micelle Architecture of Polystyrene/Poly(4-vinylpyridine) Block Copolymers in Dilute SolutionMarkus Antonietti, Steffi Heinz, Manfred Schmidt, and Christine RosenauerCite this: Macromolecules 1994, 27, 12, 3276–3281Publication Date (Print):June 1, 1994Pu…
This work has demonstrated the great influence that the specific surface of a Portland cement has on its qualification as a high or low resistance to sulfate ion attack - SIA, by means of the accelerated method ASTM C 452. For that purpose two Portland cements have been tested by means of that method. A Portland cemen…
Stones placates present a wide of problems that result in the fall of plates. One of the causes is the lack of adherence stone-mortar. We considered a study to determine the adherence between several cement mortars (1:3, 1:5, 1:7, 1:9 and a especial mortar prepared with latex) and stones (white granite, pink granites,…