Materials Literature
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This article reports and applies a recently discovered programmable multimaterial deposition process to the formation and combinatorial improvement of 3D nanostructured devices. The gas-phase deposition process produces charged <5 nm particles of silver, tungsten, and platinum and uses externally biased electrodes to…
Abstract Styrene–butadiene rubber (SBR) vulcanizates were prepared using plasticizers including the four liquid types of styrene–butadiene copolymers (LPSB), polybutadiene (LPB), polyisoprene (LPI), and the hydrogenated polyisoprene (LHPI) as well as the conventional process oil, and their phase‐separated structures a…
Abstract In this work, sodium montmorillonite clay was added, as filler, to nanocomposites of natural rubber (NR) and cellulose II (regenerated cellulose) in amounts varying from 0 to 5 phr (per hundred resin). Natural rubber (NR)/cellulose II/montmorillonite nanocomposites were prepared by co‐coagulating NR latex, mo…
Abstract Extraction characteristics are shown for trioctylphosphine oxide (TOPO) dissolved in alkane for recovery of acetic acid from dilute water solution and hardwood-derived hemicellulose extracts. The recovery of acetic acid with TOPO is significantly influenced by the pH in the aqueous phase and lightly affected…
Abstract An intumescent flame retardant system composed of ammonium polyphosphate (APP) and pentaerythritol (PER) was used for flame retarding ethylene–propylene–diene‐modified elastomer (EPDM)/polypropylene (PP) blends. Cerium phosphate (CeP) was synthesized and the effect on flame retardancy and thermal stability of…
Reversible switching of an optical gate switch in a Si waveguide including a thin Ge2Sb2Te5 phase-change material layer is reported. The phase-change was triggered by 660 nm laser pulse irradiation onto the Ge2Sb2Te5 layer with no structural damage. The switching time from the initial amorphous state to the crystallin…
Alkoxy benzoic acids are well-known liquid-crystalline compounds with nematic phase of long thermal ranges. The refractive indices measurements are carried out using a wedge-shaped cell with the help of a modified spectrometer. The birefringence (δn = ne − no) is obtained directly by using the method developed by Kucz…
Density-functional-theory calculations have been used to examine stabilization of the low density $\mathrm{BCT}$ polymorph by epitaxial strain. The relative energies of $\text{B}4$ and $\mathrm{BCT}$ polymorphs were calculated for ZnO, ZnS, and CdS, as a function of epitaxial strain, for a $\text{B}{4}_{[0001]}\ensure…
Heat conduction in three-dimensional anharmonic lattices was numerically studied by the Green-Kubo theory. For a given lattice width W, a dimensional crossover is generally observed to occur at a W-dependent threshold of the lattice length. Lattices shorter than W will display a 3D behavior while lattices longer than…
Single-walled carbon nanotubes (SWNTs) are suitable for many applications in molecular imaging because of their intrinsic near-infrared (NIR) photoluminescence. Nevertheless, several important issues, such as the SWNTs low biocompatibility, still need to be overcome for the effective use of carbon nanotubes in molecul…
Abstract Electrospun polyamide‐6 membranes containing titanium dioxide (TiO 2 ) photocatalyst were prepared and characterized. By tailoring the electrospinning parameters it was possible to obtain membranes having two different thicknesses, namely 5 and 20 µm, in which TiO 2 particles were homogeneously dispersed. As…
Truncated nanocubes of barium titanate (BT) were synthesized using a rapid, facile microwave-assisted hydrothermal route. Stoichiometric composition of pellets of nanocube BT powders was prepared by two-stage microwave process. Characterization by powder XRD, Rietveld refinement, SEM, TEM, and dielectric and polarizat…
Exciton states in lead selenide (PbSe) and lead sulfide (PbS) quantum dots have been studied extensively. However, relatively less attention has been paid to the states within the quantum dot bandgap. Our experimental results have revealed a single in-gap state which bears confinement dependence yet cannot be explaine…
The present study enlightens the role of the antagonistic potential of nonpathogenic strain B21 against sulfate-reducing bacteria (SRB) consortium. The inhibitor effects of strain B21 were compared with those of the chemical biocide tetrakishydroxymethylphosphonium sulfate (THPS), generally used in the petroleum indus…
The photoluminescence (PL) and afterglow (AGL) characteristics of SrO–Al 2 O 3 :Eu 2+ ,Dy 3+ phosphors are studied here. This phosphor was synthesized through solid‐state route with two different precursor materials. At the synthesis/annealing temperature of 1200°C and above, the phosphor prepared through either route…
This work presents a novel detection method for three-dimensional domain swapping (DS), a mechanism for forming protein quaternary structures that can be visualized as if monomers had "opened" their "closed" structures and exchanged the opened portion to form intertwined oligomers. Since the first report of DS in the…
Oxidation of spherical aluminum powder was investigated by thermogravimetric analysis in oxygen, CO 2, steam, and mixtures of these oxidizers. Heating rates ranged between 2 and 20 K/min, and the maximum temperatures were 1370 and 1770 K in atmospheres containing steam and in dry atmospheres, respectively. Qualitative…
Abstract Poly(aryl ether ketone)s (PAEKs) are a class of high‐performance engineering thermoplastics known for their excellent combination of chemical, physical and mechanical properties, and the synthesis of semicrystalline PAEKs with increased glass transition temperatures ( T g ) is of much interest. In the work re…
Ein überraschender Mechanismus wurde bei der genauen Analyse der Titelreaktion entdeckt: ein relativ schnelles, der geschwindigkeitsbestimmenden anti-syn-Rotation und der Bildung der Ru-Ru-Bindung vorgeschaltetes Gleichgewicht zwischen Cyclopentadienylkomplex 2 und Fulvalendiradikalkomplex 1. Die berechneten Energiewe…
Novel siloxane-containing liquid crystalline (LC) polyimides with methyl, chloro, and fluoro substituents on mesogenic units have been developed from siloxane-containing diamines with pyromellitic dianhydride (PMDA) or 3,3′,4,4′-tetracarboxybiphenyl dianhydride (BPDA), and their thermotropic LC behavior was examined.…