Materials Literature
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Single‐crystal CdSe nanorods ([001] orientation) with diameters in the range of 40–60 nm and aspect ratios of 5–8 were successfully synthesized at 180°C for 10 h through a facile surfactant‐assisted hydrothermal method, using Na 2 SeO 3 as a high‐quality soluble selenium source. The products were characterized by X‐ra…
The objective of this work is to characterize the magnetoelastic transduction properties of single-crystal and textured polycrystalline Fe-Ga alloys (Galfenol) under controlled mechanical, magnetic, and thermal conditions. Polycrystalline samples of interest include a directionally solidified specimen, which possesses…
BACKGROUND: The TyrA protein family includes members that catalyze two dehydrogenase reactions in distinct pathways leading to L-tyrosine and a third reaction that is not part of tyrosine biosynthesis. Family members share a catalytic core region of about 30 kDa, where inhibitors operate competitively by acting as sub…
We observed significant influence of the top-electrode material on the thickness and temperature dependences of the dielectric response of single-crystalline Ba0.7Sr0.3TiO3 thin-film capacitors. For SrRuO3∕Ba0.7Sr0.3TiO3∕SrRuO3 samples, the position of dielectric maximum shifts to lower temperatures with decreasing fi…
The effect of pH on the complexation of poly(acrylic acid) with poly(vinyl alcohol) in aqueous solution, the miscibility of these polymers in the solid state and the possibility for crosslinking the blends using gamma radiation has been studied. It is demonstrated that the complexation ability of poly(vinyl alcohol) w…
Mach–Zehnder interferometric electro-optic polymer modulators composed of highly nonlinear phenyltetraene bridge-type chromophores within an amorphous polycarbonate host matrix were investigated for their resistance to gamma rays and 25.6 MeV protons. No device failures were observed and the majority of irradiated mod…
Thermal expansion induced spontaneous microcracking in large‐grained polycrystalline alumina was analyzed using experimental techniques as well as numerical simulations. A microstructure‐based finite‐element model (object oriented finite‐element analysis) was used to simulate the accumulation of microcrack damage upon…
High-density, well aligned, -oriented wurtzite ZnO nanorod arrays with significantly different tip shapes were controllably fabricated by evaporating zinc powders at temperatures varying from 450 to 600 °C. It is found that the tip shape depends not only on the substrate but also on the substrate direction relative to…
The Gd5Ge2Si2 compound presents a giant magnetocaloric effect with transition temperature at around 276 K and is a very good candidate for application as an active regenerator material in room temperature magnetic refrigerators. Recently it has been shown that pressure induces a colossal magnetocaloric effect in MnAs,…
Visible light (>450 nm) is used to efficiently cleave carboxylic acids, amino acids, and phosphates from their N-methyl picolinium esters. Photolysis using pyrromethene dyes PM 546 and PM 597 and also coumarin 6 as photosensitizers effects release of carboxylic acids, N-protected amino acids, and phosphates in quantit…
The phase transition from Fe(II)(S=0)–CN–Mn(III)(S=2) to Fe(III)(S=1∕2)–CN–Mn(II)(S=5∕2) in Rb0.98Mn1.01[Fe(CN)6]∙0.2H2O was observed at room temperature with a one-shot-laser-pulse (λ=532nm; pulse width: 6ns) irradiation. The quantum yield (Φ) depended on the laser power density (P) and Φ=38 was achieved with a 24mJc…
The structural and dielectric properties of both pure and Nd3+-doped Ba0.77Ca0.23TiO3 (BCT23) ceramics obtained from solid-state reaction were investigated. The BCT23 ceramics sintered at 1300 °C for 3 h showed a dense microstructure without the presence of secondary phases. The use of Nd3+ as a dopant affected the mi…
The spin dynamics of a ring-shaped molecule comprising 10 iron(III) ions $(s=5∕2)$ is studied by inelastic neutron scattering. Exchange integrals and single-ion anisotropy parameters are determined by studying several intermultiplet excitations. Difficulties associated with the dimension of the Hilbert space are overc…
Rheological properties of aqueous nanometric alumina suspensions with fructose as dispersant were investigated. Differential scanning calorimetry and thermogravimetry indicated that a significant fraction of the water is immobilized by the nanometric particles in the suspension. This in turn increased the viscosity of…
Electron and energy transfer reactions of porphyrin-porphyrin-fullerene triads (P2P1C) with controllable sandwich-like structures have been studied using spectroscopic and electrochemical methods. The stabile, stacked structure of the molecules was achieved applying a two-linker strategy developed previously for porph…
Enzymatic degradation processes of poly[(R)-3-hydroxybutyric acid] (P(3HB)) and poly[(R)-3-hydroxybutyric acid-co-(R)-3-hydroxyvaleric acid] (P(3HB-co-3HV)) single crystals in the presence of PHB depolymerase from Ralstonia pickettii T1 were studied by real-time and static atomic force microscopy (AFM) observations. F…
An aliphatic polythioester was enzymatically prepared by the direct polycondensation of mercaptoalkanoic acid using immobilized lipase of Candida antarctica (lipase CA) in bulk. The commercially available 11-mercaptoundecanoic acid was polymerized by lipase CA in bulk in the presence of molecular sieves 4A as a water…
The adsorption of Congo red and tinopal CBS dyes on cellulose fibers was investigated using electronic absorption and fluorescence spectroscopies. Hydrogen bonds appear to be relevant for the dye-fiber interactions as indicated by the solvatochromism of Congo red in water, methanol, and dimethyl sulfoxide solutions, a…
A series of CeO(2)/Al(2)O(3) samples with different ceria loadings in the range 0-25 wt % (0, 2, 5, 7.5, 15, and 25%) were prepared by incipient wetness and studied using several complementary techniques such as Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), temperature-programmed reduction (TPR), Raman, high-…
Linear 1 H -imidazole amphiphiles ( 1 − 3 ) were synthesized by the esterification reaction of 4‘-alkyloxy phenol with 4-chlorocarbonyl imidazole. They formed organogels. When 1 N of the imidazole head was blocked by an ethyl group, however, the compound ( 4 ) did not self-assemble. The SAX and TEM study revealed that…