Materials Literature
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Ethylene-vinyl acetate copolymer, EVA (containing 28% vinyl acetate (VA)) and organoclay, tallow benzyl dimethyl ammonium ion with montmorillonite (ranging from 1 to 8 wt%) were melt processed in order to determine the relationship between the polarity of the polymer matrix and the organoclay structure on the properti…
We have identified, in erbium-doped silica with ${\text{SnO}}_{2}$ nanocrystals, excitation-diffusion processes restricted to the single nanocrystal. Time-resolved measurements of erbium infrared luminescence excited by energy transfer via nanocrystal excitation, together with the identification and quantification of…
Nanocomposites, having neat polycyanurate networks (PCN) and modified by polytetramethylene glycol polycyanurate networks (PCN/PTMG) as matrices and montmorillonite (MMT) as filler, were prepared using thermal polymerization, and studied with respect to polymerization kinetics, morphology and in particular, molecular…
The long-term cyclic durability of nano-engineered solid-state hydrogen storage systems is investigated using LiNH2+LiH as a model system. Through 60 hydriding and dehydriding cycles over the course of more than 200 h, a small decrease in the kinetics of the dehydrogenation reaction leads to a 10% reduction in the amo…
Abstract The development of high‐performance non‐wood lignocellulosic board without using synthetic adhesives derived from fossils resources is very important for the future. In this study, the characterization of bagasse particleboard bonded with chitosan was investigated. The 4 wt % chitosan‐acetic acid solution was…
A non-centrosymmetric borate, CaBiGaB(2)O(7), has been grown by a solid-state reaction method at a temperature below 700 °C. The single-crystal x-ray structural analysis has shown that it crystallizes in the tetragonal space group [Formula: see text] with a = 0.7457(1) nm, c = 0.4834(1) nm, Z = 2. It has a three-dimen…
We have performed density functional calculations for 40- and 90-atom supercells of ${\text{SrTiO}}_{3}$ doped by manganese. We use the all-electron, full-potential local-orbital scheme. We show that Mn ion substituting for Sr occupies the off-central position. The ions of the host lattice also change their equilibriu…
In this letter, we report the design and fabrication of different metal patterns for the realization of spatially controlled hydrophobic/hydrophilic regions with micrometer resolution. The fabrication procedure, based on a combination of lithographic techniques and wet-chemistry reactions (namely, spontaneous Galvanic…
As is well known, liquid-liquid phase separation can occur either upon heating or cooling, corresponding to lower and upper critical solution phase boundaries, respectively. Likewise, self-assembly transitions from a monomeric state to an organized polymeric state can proceed either upon increasing or decreasing tempe…
We have recently shown that organo-metallic complexes formed by laser ablating transition metals in ethylene are high hydrogen absorbers at room temperature (Phillips and Shivaram 2008 Phys. Rev. Lett. 100 105505). Here we show that the absorption percentage depends strongly on the ethylene pressure. High ethylene pre…
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Atomic structures and ionic substitutions in sodium titanate $({\text{Na}}_{2\ensuremath{-}x}{\text{H}}_{x}{\text{Ti}}_{3}{\text{O}}_{7})$, having ${\text{Ti}}_{3}{\text{O}}_{7}$ sheetlike layers with ${\text{Na}}^{+}$ and ${\text{H}}^{+}$ in between, were investigated by first-principles calculations. The formation e…
In this work we review recent computational advances in the understanding of the relaxation dynamics of supercooled glass-forming liquids. In such a supercooled regime these systems experience a striking dynamical slowing down which can be rationalized in terms of the picture of dynamical heterogeneities, wherein the…
Fully recrystallised zircaloy 2 samples were subjected to different degrees of uniaxial compression. Grains of high Taylor factors showed {1012}〈1011〉 deformation twins, noticeable up to 13–16% compression. Twinning strongly affected the crystallographic texture and also brought in clear differences in stored energy a…
Mesoscale hydrodynamic calculations have been conducted in order to gain further insight into the dynamic compaction characteristics of granular ceramics. With a mesoscale approach each individual grain, as well as the porosity, is modeled explicitly; the bulk behavior of the porous material can be resolved as a resul…
It is well known that gadolinium doped ceria (GDC), when subjected to reducing conditions, undergoes significant volumetric expansion and changes its elastic stiffness. In this paper, a methodology based on a semi-analytical formulation in conjunction with molecular dynamic (MD) simulation is presented to determine th…
Hydrophilic character of jute fibers was reduced by acrylation of alkali treated fibers. Jute (treated and untreated) composites of mixed matrix material (25 wt% epoxy resin of bisphenol-C (EBC) and 25 wt% bisphenol-C-formaldehyde (BCF) of jute fibers) were prepared by hand lay-up technique at 150°C under 7.6 MPa pres…
We have investigated the issue of two-dimensional (2D) versus three-dimensional (3D) structures for neutral-state Au10 and clarified the lowest-energy structure among a few 2D Au10(-) isomers. Though almost all previous works were based on density functional theory (DFT), we here carried out not only extensive DFT cal…
Abstract Long‐chain branching polypropylene (LCB‐PP) was achieved by reactive extrusion in the presence of bifunctional monomer [1,6‐hexanediol diarylate (HDDA)] and peroxide of dicumyl peroxide (DCP). Influences of HDDA and DCP concentrations on the branching efficiency were comparatively evaluated. Fourier transform…
We present a fully printable effective negative refractive index (NRI) metamaterial responsive to arbitrarily linearly polarized incident waves. The proposed metamaterial is composed of a periodic array of tightly coupled Jerusalem cross conductor pairs printed on the opposite sides of a dielectric substrate. Each pai…