Materials Literature
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Highly textured Bi 3 NbTiO 9 ceramics are fabricated by normal sintering from molten salt‐synthesized plate‐like crystallites. Fine Bi 3 NbTiO 9 plate‐like crystallites (∼1 μm) not only facilitate the densification, but also enhance texture in Bi 3 NbTiO 9 ceramics. Weak‐agglomerated platelets exhibit higher sinterabi…
Automatic fitting methods that build molecules into electron-density maps usually fail below 3.5 A resolution. As a first step towards addressing this problem, an algorithm has been developed using an approximation of the medial axis to simplify an electron-density isosurface. This approximation captures the central a…
Abstract Summary: Polyurethane/silica hybrid coatings were prepared via in situ (IS) or blending (BL) method using different acidic silica sols. The effects of preparation methods, silica types, and content on the structure and mechanical properties of the hybrid coatings were investigated. It was found that there exi…
Abstract The crystal structures of solvent-free lithium, sodium, rubidium, and cesium squarates have been determined from high resolution synchrotron and X-ray laboratory powder patterns. Crystallographic data at room temperature of Li 2 C 4 O 4 : a = 7.1073(3) Å, b = 9.5627(4) Å, c = 3.2973(1) Å, β = 101.11(1)°, V =…
The coherent spin dynamics of holes in Mg-doped ($p$-type) wurtzite GaN is studied by time-resolved Kerr rotation technique. We observe the spin precession of holes with the spin coherence time of $120\phantom{\rule{0.3em}{0ex}}\mathrm{ps}$, which is distinguished from that of electrons by comparison with the results…
Indirect high resolution electron microscopy using one of several possible data-set geometries offers advantages over conventional high-resolution imaging in enabling the recovery of the complex wavefunction at the specimen exit plane and simultaneously eliminating the aberrations present in the objective lens. This a…
Abstract For three icosahedral alloys in the Mg—Zn- RE ( RE = Ho, Y) systems, the atomic pair distribution functions (PDFs) have been obtained from sealed X-ray tube (in-house) and synchrotron (ESRF and APS) powder diffraction experiments. The PDFs are at least qualitatively comparable and are suitable for least squar…
We prepared a novel composite consisting of a side chain liquid crystalline polysiloxane matrix and gold nanoparticles. We showed that the size and morphology of the nanoparticles were strongly linked to the macroscopic organization of the mesophase during reduction of gold ions
Nanophase aluminum powder was characterized in a field-emission-gun transmission electron microscope (TEM). Different techniques were used to investigate the structure of the particles, including conventional bright-field and dark-field imaging, scanning transmission electron microscopy (STEM), high-resolution lattice…
Tubular carbon cones (TCCs) with nanometer-sized tips and micrometer-sized roots, having a herringbone hollow interior surrounded by helical sheets of graphite coiling around, were grown on Au wires by hot filament chemical vapor deposition (HFCVD). These TCCs exhibit excellent field emission properties with a very lo…
BACKGROUND: It has been suspected that synthetic colloids may interfere with leukocyte adhesion by down-regulation of endothelial cell adhesion molecules. Although inhibition of endothelial inflammation might reduce leukocyte-related tissue injury, the same mechanism may be detrimental for host defense during severe i…
The novel crystallization properties of nano-materials represent a great challenge to researchers across all disciplines of materials science. Simple binary solids can be found to adopt unprecedented structures, when confined into nanometer-sized cavities, such as the inner cylindrical bore of single-walled carbon nan…
The infrared reflectivity spectra of a ${\mathrm{Pr}}_{2}\mathrm{Ni}{\mathrm{O}}_{4+\ensuremath{\delta}}$ single crystal and its high-temperature dependence (300--1300 K) are investigated for light polarized in the basal plane. Fitting with the appropriate model allows one to discriminate localized and itinerant charg…
Experimental data associated with plastic deformations indicate that the temperature is less than that predicted from dissipation based on plastic work. To obtain reasonable correlation between theoretical and experimental results, the plastic work is often multiplied by a constant beta. This paper provides an alterna…
Composites in the SiC–TiC–Ti 3 SiC 2 system were synthesized using reactive hot pressing at 1600°C. The results indicate that addition of Ti 3 SiC 2 to SiC leads to improved fracture toughness. In addition, high microhardness can be retained if TiC is added to the material. The best combination of properties obtained…
Abstract The study investigated seam efficiency, seam strength and seam elongation of three stitch densities for a premium muslin. The tensile and seam strength were tested on INSTRON. Seam efficiency was calculated in percentages and t ‐test and Analysis of Variance ( anova ) were used to test the hypotheses. Finding…
To obtain detailed structural information for spider dragline spidroin (MaSp1), we prepared three versions of the consensus peptide GGLGGQGAGAAAAAAGGAGQGGYGGLGSQGAGR labeled with 13C at six different sites. The 13C CP/MAS NMR spectra were observed after treating the peptides with different reagents known to alter silk…
We report on the integration of fully functional ferroelectric PbTiO3 nanostructures of typically less than 100nm lateral extension into a low-k dielectric hydrogen silsesquioxane film. Chemical mechanical polishing of the dielectric layer down to an overall thickness below the nanoparticles height exposes the structu…
A distinctive feature of the examined class of solids is that a part of the entropy production is due to rate-independent dissipation, as in models of plasticity, damage or martensitic transformations. The standard condition for thermodynamic stability is shown to be too restrictive for such solids and, therefore, an…
In this paper a convenient route for synthesizing Au(core)-Pd(shell) bimetallic nanoparticles in toluene has been reported as a result of co-reduction of gold(III) and palladium(II) precursors in toluene. N,N-Dimethyldodecylamine was used as a capping agent for the core-shell particles, which not only imparts stabilit…