Materials Literature
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Nanostructured conjugated organic thin films are essential building blocks for highly integrated organic devices. We demonstrate the large-area fabrication of an array of well-ordered 15 nm wide conducting polymer nanowires by using an etch mask consisting of self-assembled patterns of cylinder-forming poly(styrene-b-…
We synthesize CuGaSe 2, CuInSe 2, and Cu(InGa)Se 2 nanoparticles in oleylamine with narrow size distribution using commercial grade copper, indium, gallium salts, and Se powder. Tunable nanoparticle size and composition are achieved through manipulation of reaction temperature and precursor concentrations. Ternary and…
Abstract Combretastatin‐A2 (CA2), a potential anticancer drug in advanced preclinical development, is extracted from the medicinal plant C ombretum caffrum. The NIR‐FT Raman and FT‐IR spectral studies of the molecule were carried out and a b initio calculations performed at the B3LYP/6‐31G(d) level to derive the equil…
Amorphous solids are conventionally formed by supercooling liquids or by concentrating noncrystallizing solutes (spray-drying and freeze-drying). However, a lot of pharmaceutical processes may also directly convert compounds from crystal to noncrystal which may have desired or undesired consequences for their stabilit…
We show here the biodegradation of single-walled carbon nanotubes through natural, enzymatic catalysis. By incubating nanotubes with a natural horseradish peroxidase (HRP) and low concentrations of H2O2 (approximately 40 microM) at 4 degrees C over 12 weeks under static conditions, we show the increased degradation of…
Zinc oxide is a unique material that exhibits exceptional semiconducting, piezoelectric, and pyroelectric properties. Nanostructures of ZnO are equally as important as carbon nanotubes and silicon nanowires for nanotechnology and have great potential applications in nanoelectronics, optoelectronics, sensors, field emi…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
The oriented crystallization of polyethylene (PE) in uniaxially oriented films of compatible blends with polyamide 11 (PA11) was studied. The PE sample used was a random copolymer of PE with methacrylic acid (MAA), poly(ethylene-co-methacrylic acid) (PEMAA), with 4wt% MAA units. Oriented films of PA11/PEMAA blends wer…
Abstract In this paper we report a method to determine tensile strengths and Young’s modulus of cubic biaxial textured metal tapes used as substrate materials for coated conductors (CC). Simplicity, rapidity and reproducibility of the procedure are important for the evaluation of continuous in-house productions. Our a…
We have made a first-principles calculation of the topological, geometric, and electronic structures of nitrogen-doped armchair and zigzag silicon carbide nanotubes, where we have assumed that all carbon atoms have been substituted by nitrogen atoms. The doping was found to be substantially easier than for analogous c…
Abstract A new binary phase, Cu 10 In 7 , was found during the investigation of the η ‐phase field in the Cu‐In system. Single crystals of Cu 10 In 7 were grown from a melt under an inert atmosphere. The compound crystallizes in the monoclinic space group C 2/ m with cell parameters a = 13.8453(2) Å, b = 11.8462(1) Å,…
Magnetodielectric coupling effects of single phase multiferroic Pb(Fe0.5Nb0.5)O3 ceramics have been studied using standard ferroelectric measurements and electron paramagnetic resonance (EPR). Changes in the electrical polarization behavior were observed in the paramagnetic to weakly magnetized antiferromagnetic trans…
Carbon nanotubes (CNTs) are coated over the MgO protective film in an ac plasma display panel for the stabilization of discharges. The emission of priming electrons from CNTs was evaluated by analyzing the time, voltage, and temperature dependence of the statistical discharge delay. By employing CNTs as a source of pr…
With the equations of fluid mechanics, the proper boundary conditions, and the gas properties, we simulate the processes of single-bubble sonoluminescence. The calculation demonstrates the process of the evolution of the radiation energy spectrum with time for bright sonoluminescing bubbles, which clearly shows how th…
The threshold switching of Ge2Sb2Te5 (GST) films for phase change random access memory applications was investigated by measuring the variation in the threshold voltage (VT) with the crystallinity of the GST films and photon energy absorption spectra. As the GST film was amorphized, VT increased to approximately 1 V a…
Various formulations of wood flour and rigid Poly Vinyl Chloride (PVC) composites were prepared and the effects of layering and composite composition on their physical properties were studied. Beech wood flour, PVC, Maleic Anhydride Polyethylene (MAPE), and beech veneer were used to produce the composites in a two-ste…
Micrometer-thick perovskite-type multilayer heterostructures with ten thousands of unit cells, [SrNb0.05Ti0.95O3∕La0.9Sr0.1MnO3]3, have been fabricated on Si substrates. The structure exhibited nonlinear and rectifying current-voltage characteristics. Stable and temporal photovoltaic effects in the multilayer have bee…
A magnetoelectric (ME) composite with controlled nanostructures is synthesized using coassembly of two inorganic precursors with a block copolymer. This solution processed material consists of hexagonally arranged ferromagnetic cobalt ferrite [CoFe2O4 (CFO)] nano cylinders within a matrix of ferroelectric lead zirconi…
The nonisothermal crystallization kinetics and microhardness of nanocomposites consisting of a polypropylene matrix (PP) and carbon nanotube filler (CNT) have been investigated. Three types of PP matrixes have been used: two of them are nonfunctionalized PP that differ slightly in their melt flow index, whereas the th…
The mechanical properties (tensile, flexural, and impact properties) and water absorption of oil palm empty fruit bunches (OPEFB) reinforced in new unsaturated polyester composites were studied. New OPEFB reinforced polyester composite derived from new unsaturated polyester resin containing bis-(2-hydroxylethyl) fumar…