Materials Literature
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Abstract The surface flashover behavior in ambient air and nitrogen are studied at a pressure of 1 kg/cm2using optical emission spectroscopy. A high dc voltage is applied to Rogowski profile electrodes with polyoxymethylene as the insulator between the electrodes. Three different conditions of needle protrusion along…
The conformational energy landscape of a protein determines populations of all possible conformations of the protein and also determines the kinetics of the conversion between the conformations. Interaction with ligands influences the conformational energy landscapes of proteins and shifts populations of proteins in d…
Treatment of [IrCl3(tht)3], where tht = tetrahydrothiophene, with two equiv. of phenyl diphenylphosphinite (pdpitH) gave [Ir(pdpitH)(pdpit)(tht)Cl2] (1), which on further reaction with 3-t-butyl-5-(2-pyridyl)-1,2,4-triazole (bptzH) and NaOAc using a one-pot reaction afforded [Ir(pdpit)2(bptz)] (2). In sharp contrast,…
Lipid-based dispersion of hydrophobic nanoparticles (NPs) not only gives fundamental insight into how nanomaterials distribute in live cells and organisms, but also provides a quite general route to designing nanocarrier agents in triggered drug delivery and medical imaging. It is not clearly understood how hydrophobi…
Interaction between local magnetization and conduction electrons is responsible for a variety of phenomena in magnetic materials. It has been recently shown that spin current and associated electric voltage can be induced by magnetization that depends on both time and space. This effect, called spinmotive force, provi…
For the purpose of obtaining solvent-free epoxy acrylate latexes of good stability and excellent integrated performance, the epoxy acrylate latexes were fabricated using facile semi-continuous emulsion polymerization with varying amounts of epoxy resin and were modified by a silane coupling agent γ-methacryloxypropylt…
A series of 25 × 25 × 25 Å(3) octahedral coordination cages [Pd6(L)8](NO3)12 (L = L(1), 1; L = L(2), 2; L(1) = tris(6-quinolyl)trimesic ester; L(2) = N,N',N''-tris(6-quinolyl)-1,3,5-benzenetricarboxamide) is reported. L(1) and L(2) are indistinguishable for construction of octahedral nanocages, and thus the desirable…
Objective: The aim of this study was to improve the dissolution rate of gliclazide by developing a surface solid dispersion (SSD) with Avicel PH 101 as a carrier. Methods: S olid dispersions of gliclazide were prepared, with various ratios of gliclazide and Avicel PH 101, using the solvent evaporation method. Evaluati…
Low open-circuit voltages (850-870 mV), due to excessive bulk and surface recombination, currently limit CdTe photovoltaic efficiencies. Here, we study surface recombination in single crystals with single-photon excitation time-resolved photoluminescence (1PE-TRPL) to measure minority carrier lifetimes. Typically, min…
Microwave irradiation was used to reduce consumption of energy and time during bleaching of wool fabrics with hydrogen peroxide. The effect of some reaction conditions; viz. hydrogen peroxide concentration, treatment time, presence of stabilizer, on degree of whiteness imparted to bleached wool, was studied systematic…
Core/shell heterostructured TiO2/CdSxSe1-x nanowire arrays (NWAs) were prepared via physical vapor deposition of CdSxSe1-x layer onto the hydrothermal pre-grown TiO2 NWAs with FTO as conductive substrate. By change the sulfur content (x) in the TiO2/CdSxSe1-x nano-composites, it was observed that the light absorption…
This paper reports an investigation into the aging of pyrolyzed cobalt/polypyrrole (Co/PPy) oxygen reduction reaction (ORR) electrocatalysts, based on quasi-in-situ photoelectron microspectroscopy. The catalyst precursor was prepared by potentiostatic reverse-pulse coelectrodeposition from an acetonitrile solution on…
We study the possibility of surface plasmon polariton (SPP) pulse shape, delay and duration manipulation on sub-picosecond timescales via a high intensity pump SPP pulse photoexciting electrons in a gold film. We present a theoretical model describing this process and show that the pump induces the phase modulation of…
This group reports the direct observation of the coexistence of ferromagnetism and superconductivity in UCoGe by scanning SQUID microscopy. Comparing the observations to models for flux expulsion and of the vortex state, they conclude that this compound presents a spontaneous vortex phase in zero applied field.
Glass plays an important role in many engineering applications including transparent armor. Determining the actual strength of a glass is problematic because typical glass strength numbers are presented in the literature as ranges. Minor changes in surface finish, composition, test method employed, and processing all…
The catalytic combustion characteristics of low concentration (0.15–3 vol%) methane combustion in a lab-scale fluidized bed with 0.5 wt% Pd/Al2O3 as catalytic particles were studied experimentally. A mathematical model was developed according to the flow and reaction characteristics of the fluidized bed. The effects o…
The evaluation of the experiments of the effective delayed neutron parameters and reactivity performed in the IPEN/MB-01 research reactor facility has been successfully accomplished. The evaluated data are of very good quality and fulfill the requirements of a benchmark. The recently released MCNP6 together with the E…
We present an experimental study of x-ray absorption near edge structure (XANES) at ${L}_{2,3},\phantom{\rule{0.16em}{0ex}}{M}_{2,3}$, and $K$ edges of, respectively, Fe, Zr, and O in iron-doped zirconia $({\mathrm{ZrO}}_{2}:\mathrm{Fe})$ for different Fe dopant concentrations $x$ (from $x\ensuremath{\sim}6%$ to $x\en…
A label-free fluorescence turn-on sensing system based on fluorescence resonance energy transfer (FRET) between CdTe/CdS quantum dots (QDs) and gold nanoparticles (AuNPs) is developed for the detection of melamine. This FRET process originated from a fluorescent donor–acceptor pair, in which CdTe/CdS quantum dots act…
Optical control of cellular processes is an emerging approach for studying biological systems, affording control with high spatial and temporal resolution. Specifically designed artificial photoswitches add an interesting extension to naturally occurring light-regulated functionalities. However, despite a great deal o…