Materials Literature
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Structural modification of castor oil has been done with tris (m-hydroxy phenyl) phosphate (THPP) using the ester exchange process. The resultant compound was a phosphorus-based polyol that was reacted with different diisocyanates like TDI, IPDI, HMDI, and MDI to form a series of flame-retardant polyurethanes. These p…
Possible crystal structures of ethyl-tert-butyl ether (ETBE) were predicted by global lattice-energy minimizations using the force-field approach. 33 structures were found within an energy range of 2 kJmol(-1) above the global minimum. Low-temperature crystallization experiments were carried out at 80-160 K. The cryst…
We report the attenuance and temperature-dependent photoluminescence spectra of PbSe nanowires with diameters between 5.6 and 26.4 nm (12−23% relative standard deviation) and lengths greater than 1 μm. The nanowire first exciton energy varies between 0.3 and 0.6 eV as the diameter decreases from 26.4 to 5.6 nm, respec…
Density functional theory (DFT) and the valence bond configuration interaction (VBCI) model have been applied to the oximato-based Mn(III)(3)O single-molecule magnets (SMMs), allowing one to correlate the Mn(III)-Mn(III) exchange coupling energy (J) with the bridging geometry in terms of two structural angles: the Mn-…
We determine the structure, energetics, and emerging magnetic propertiesof Au n clusters using first-principles plane-wave density functional theory. We compare and contrast the findings obtained with and without spin−orbit interaction in the gold clusters of sizes down to 0.5−1 nm. The shapes are chosen to be represe…
Abstract The morphology and properties of nylon6/HDPE blends without and with nanoclay has been reported. Scanning electron microscopy study of the (70/30 w/w) nylon6/HDPE blends with small amount (0.1 phr) of nanoclay indicated a reduction in the average domain sizes ( D ) of dispersed HDPE phase and hence better ext…
Carbon nanotubes (CNTs) have received much attention for performance and toxicity, but vary substantially in terms of impurity type and content, morphology, and surface activity. This study determined the decrease of antioxidant capacity, defined as biological oxidative damage (BOD), of CNTs-exposed serum. The variabi…
The room-temperature chemical transformation of spherical CdTe nanoparticles into anisotropic alloyed CdHgTe particles using mercury bromide in a toluene/methanol system at room temperature has been investigated. The resulting materials readily dissolved in toluene and exhibited a significant red-shift in the optical…
We study suspensions of colloidal spheres with a constant zeta-potential within Poisson-Boltzmann theory, quantifying the discharging of the spheres with increasing colloid density and decreasing salt concentration. We use the calculated renormalized charge of the colloids to determine their pairwise effective screene…
Liquid metal-solid semiconductor heterostructures, Hg heads combined with single-crystalline β-HgS tails, with controllable sizes and well-defined interfaces have been fabricated for the first time via one-pot synthesis. Such heterostructures can exist in water with good stability due to coordination adsorption of cys…
Abstract (Nd 1– x Gd x ) 2 (Ce 1– x Zr x ) 2 O 7 (0 ≤ x ≤ 0.5) ceramic powders synthesised by the chemical‐coprecipitation and calcination method were pressureless‐sintered at 1,973 K for 10 h in air. The structure and electrical conductivity of (Nd 1– x Gd x ) 2 (Ce 1– x Zr x ) 2 O 7 ceramics were investigated by the…
BACKGROUND: Nanoparticles (NPs) are widely studied for biomedical applications. Understanding interactions between NPs and biomolecules or cells has yet to be achieved. Here we present a novel in vivo method to study interactions between NPs and the nervous system of the discoid or false dead-head roach, Blaberus disc…
To demonstrate the structure sensitivity of double inner-shell hole spectroscopy, we have measured energies of ${\mathrm{H}}_{2}$S${}^{2+}$, SO${{}_{2}}^{2+}$, and CS${{}_{2}}^{2+}$ with the two vacancies in the sulfur 2$p$ shell using a multielectron coincidence technique combined with synchrotron radiation. We descr…
A novel long-lasting phosphorescence (LLP) material Ba4(Si3O8)2:Eu2+, Dy3+ with high chemical stability was achieved successfully. Two emission centers (Eu (I) and Eu (II)) were found in Ba4(Si3O8)2 due to the substitution of Eu2+ in different Ba2+ sites. Both Eu (I) and Eu (II) had contribution to the afterglow proce…
We have studied the changes in the magnetic behavior of highly oriented pyrolytic graphite (HOPG) samples subjected to medium-energy proton and helium irradiation. The variations of the ferromagneticlike magnetization curves with the irradiation dose have been studied for two configurations: magnetic fields parallel a…
Wood-polyvinyl chloride (PVC) composites were prepared using industrial wood particles used for manufacturing three-layer particleboards. The effect of particle size (0.25–0.5, 0.5–1, 1–2, and 2–4 mm) on the mechanical properties of the composites was investigated. The effect of cross-section size (4×10, 6×15 and 8×20…
The electronic structure of iron phthalocyanine (FePc) in the valence region was examined within a joint theoretical-experimental collaboration. Particular emphasis was placed on the determination of the energy position of the Fe 3d levels in proximity of the highest occupied molecular orbital (HOMO). Photoelectron sp…
Poly(3,4-ethylenedioxythiophene) (PEDOT) was deposited on ITO surface by cyclic voltammetry from mixed toluene/acetonitrile solvent. Thickness and oxidation state of the layer were monitored by UV−vis−NIR spectroscopy and grazing angle FTIR (GA-FTIR) spectroscopy. Morphology had fibrillar character with roughness and…
Nanofibers of polyamide have been synthesized using electrospinning processes and their wetting properties determined directly from a nanoscale Wilhelmy balance approach. Individual electrospun polyamide nanofibers were attached to atomic force microscope (AFM) tips and immersed in a range of organic liquids with vary…
Abstract Ultrasound‐assisted deacetylation (USAD) produces chitosan by treating beta‐chitin suspended in 40% aqueous sodium hydroxide with high‐intensity ultrasound irradiation. Chitosans resulting from the application of non‐isothermal and isothermal USAD processes were characterized using NMR spectroscopy, X‐ray dif…