Materials Literature
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Room-temperature volume measurements of the complete set of calcite-structure carbonates in the pressure range 0-8.1 GPa revealed systematic differences in compressibilities that depend on cation type, resulting in significant deviations from empirical relations of an inverse linear correlation between K 0 and V 0 .…
The defect structure of cubic fluorite structured yttria-stabilized zirconia $({\mathrm{ZrO}}_{2}{)}_{1\ensuremath{-}x}({\mathrm{Y}}_{2}{\mathrm{O}}_{3}{)}_{x}$ has been investigated over the composition range $0.100(4)<~x<~0.241(10)$ and temperatures $T(K)$ up to 2780(10) K, using single-crystal specimens. Anal…
Abstract This paper presents the mechanical and thermal properties of unidirectional, degradable, environment‐friendly “green” composites made from pineapple fibers and poly(hydroxybutyrate‐co‐valerate) (PHBV) resin. Tensile and flexural properties of the “green” composites with different fiber contents were measured…
The solution structure and dynamics of metal-bound water exchange have been investigated in a series of lanthanide complexes of primary, secondary, and tertiary tetraamide derivatives of 1,4,7,10-tetraazacyclododecane. In the gadolinium complexes at ambient pH, water exchange lifetimes (τ m ) determined by 17 O NMR we…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTX-ray Analysis of Structural Changes in Photochromic Salicylideneaniline Crystals. Solid-State Reaction Induced by Two-Photon ExcitationJun Harada, Hidehiro Uekusa, and Yuji OhashiView Author Information CREST Japan Science and Technology Corporation (JST) Department o…
Synthetic epidotes were produced using a Tuttle type hydrothermal vessel in the temperature range from 500 to 700 ℃ and at 4.5 to 5.0 kbars pressure. Single-crystal X-ray diffraction structure refinements yielded intracrystalline cation distributions for two crystals grown at 600 ℃ (0.68 and 0.73 Fe apfu) and five cry…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTHot Spot Conditions during Cavitation in WaterYuri T. Didenko, William B. McNamara, and Kenneth S. SuslickView Author Information Department of Chemistry, University of Illinois at Urbana-Champaign, 601 S. Goodwin Avenue, Urbana, IL 61801 Cite this: J. Am. Chem. Soc. 1…
The chemical structure and bonding of Al 4 C and Al 4 C - have been studied by photoelectron spectroscopy and ab initio calculations. While Al 4 C is known to be a tetrahedral molecule, the data reported here suggest that Al 4 C - has D 4 h symmetry (when averaged over zero-point vibrational motions) and thus is the s…
The optical properties of high quality single crystal epitaxial zinc oxide thin films grown by pulsed laser deposition on c-plane sapphire substrates were studied. It was found that annealing the films in oxygen dramatically improved the optical and electrical properties. The absorption coefficient, band gap, and exci…
An inductive technique for the measurement of dynamical magnetic processes in thin-film materials is described. The technique is demonstrated using 50 nm films of Permalloy (Ni81Fe19). Data are presented for impulse- and step-response experiments with the applied field pulse oriented in the plane of the film and trans…
Multilayer films of the proteins fluorescein isothiocyanate-labeled bovine serum albumin (FITC-BSA) and immunoglobulin G (IgG) were assembled on 640 nm diameter polystyrene (PS) latex particles by their alternate deposition with either positively or negatively charged polyelectrolytes. The proteins and polyelectrolyte…
The program PDFFIT is designed for the full profile structural refinement of the atomic pair distribution function (PDF). In contrast to conventional structure refinement based on Bragg intensities, the PDF probes the local structure of the studied material. The program presented here allows the refinement of atomic p…
We have examined the interaction of molecular oxygen with the TiO 2 (110) surface using temperature-programmed desorption (TPD), isotopic labeling studies, sticking probability measurements, and electron energy loss spectroscopy (ELS). Molecular oxygen does not adsorb on the TiO 2 (110) surface in the temperature rang…
We use extensive classical molecular-dynamics simulations to calculate the thermal conductivity of a model silica glass. Apart from the potential parameters, this is done with no other adjustable quantity and the standard equations of heat transport are used directly in the simulation box. The calculations have been d…
When polyethylene (PE) is deformed to large strains, the stress originates from both the viscous forces associated with the plastic deformation of the crystallites by slip and fragmentation processes and the entropic elastic forces arising from the stretching of the entangled amorphous regions. Relative weights of the…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTRole of l-3,4-Dihydroxyphenylalanine in Mussel Adhesive ProteinsMiaoer Yu, Jungyeon Hwang, and Timothy J. DemingView Author Information Departments of Materials and Chemistry University of California, Santa Barbara Santa Barbara, California 93106 Cite this: J. Am. Chem…
The basic approach bonding in tetrahedral semiconductors elastic properties of semiconductors the dielectric properties of semiconductors semiconductor energy bands electronic properties effects of lattice distortions impurities and defects bonding in ionic crystals elastic properties of ionic crystals dielectric prop…
Banana-shaped compounds form several new smectogenic phases specific to this class. Several two-dimensional phases have been observed, and these can exhibit very complex and beautiful optical textures (see Figure). These phases are reviewed and their structures investigated by not only X-ray diffraction and nuclear ma…
Glycidol represents a latent cyclic AB 2 -type monomer that can be polymerized in a ring-opening multibranching polymerization (ROMBP). Hyperbranched aliphatic polyethers with controlled molecular weights and narrow molecular weight distribution have been prepared via anionic polymerization of glycidol with rapid cati…
The effect of rubber phase content on notched Izod for polystyrene (PS) and polybutadiene (PB) blends compatibilized with PS-PB diblock and PS-PB-PS triblock copolymers has been studied. The effectiveness of various PS-PB-PS triblock copolymers in improving the impact strength of PS/PB blends has been studied. The eff…