Materials Literature
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Abstract New bifunctional catalysts composed of PdCl 4 2− , OsO 4 2− and OsO 4 2− , WO 4 2− designed and prepared by a counterionic stabilization technique involving the reactions of Na 2 PdCl 4 ‐K 2 OsO 4 and K 2 OsO 4 ‐Na 2 WO 4 with nanocrystalline MgO are well characterized. These bifunctional catalysts, NAP‐Mg‐Pd…
Response function measurement of layered-type chemical vapor deposition single crystal diamond radiation detectors for 14 MeV neutrons was carried out. The detector had a layered structure that was composed of a boron-doped diamond layer of 0.5 μm in thickness and a nondoped diamond layer of 20 μm on an inexpensive hi…
Vilsmeier formylation is one of the most widely used substitution reactions for the functionalization of porphyrins. However, its utility is limited by the electrophilic/acidic reaction conditions, deactivation of the aromatic system and regiochemical problems, the requirement for metal complexes and necessity for sub…
We demonstrate the crystallization of a membrane protein using femtosecond laser irradiation. This method, which we call the laser irradiated growth technique (LIGHT), is useful for producing AcrB crystals in a solution of low supersaturation range. LIGHT is characterized by reduced nucleation times. This feature is i…
The initial steps toward a miniature, field portable sensor based on surface-enhanced Raman spectroscopy (SERS) are presented. It is demonstrated that a low-cost miniaturized Raman system can be used in place of a larger, higher-cost conventional Raman system. This system was developed by sequentially replacing compon…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTBridge to Loop Transition in a Shear Aligned Lamellae Forming Heptablock CopolymerLifeng Wu, Timothy P. Lodge, and Frank S. BatesView Author Information Department of Chemical Engineering and Materials Science and Department of Chem…
Mineral crystals in biological materials such as bone, tooth, and sea shell are susceptible to buckling under compressive loading due to their slender geometry with large aspect ratios. How does nature deal with this problem? This question is especially interesting in view of the three orders of magnitude difference i…
Dielectric response of epitaxial thin films of perovskite ${\mathrm{Ba}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{TiO}}_{3},x=0$, 0.2, 0.6, was experimentally studied as a function of temperature, frequency, and amplitude of ac electric field. Decrease of temperatures of dielectric maxima ${T}_{m}$ with respect to…
Ceramic composites with the composition of x PMZNT·(1 – x )NiCuZn have been prepared using a standard ceramic technique, in which x varies as 0, 0.1, 0.2, 0.4, 0.6, 0.9, and 1.0. PMZNT is the abbreviated form of 0.92Pb(Mg 1/3 Nb 2/3 )O 3 ·0.04Pb(Zn 1/3 Nb 2/3 )O 3 ·0.04PbTiO 3 (PMN‐PZN‐PT). NiCuZn is the abbreviated f…
Abstract Layer‐by‐layer self‐assembled polyelectrolyte films containing a charged cyclodextrin and lipopolysaccharide (LPS) are developed for the first time as a potential model for local endotoxin antagonist delivery. We have examined the biological activity of a lipopolysaccharide from E. coli incorporated into mult…
Abstract Features of the renormalized and twice renormalized Rouse models were examined numerically. Based on numerical evaluations of the generalized Langevin equation in renormalization approaches, nonexponential normal mode autocorrelation functions were derived, that can be described over two orders of magnitude b…
Surface Science: An Introduction , K. Oura , V. G. Lifshits , A. A. Saranin , A. V. Zotov , and M. Katayama Springer-Verlag, New York, 2003. $89.95 (440 pp.). ISBN 3-540-00545-5 Buy at Amazon
Two phase Zr – 2.5 wt-%Nb is used as pressure tube material in water cooled and moderated reactors. The in service behaviour of this hcp zirconium based alloy is dependent on strong textures developed during thermomechanical processing. In the present study, the texture evolution during fabrication of this material, u…
The colloidal QDs of GaAs and CdS semiconductors with the radiuses about 20Å and 30Å correspondingly have been formed by laser ablation method in the liquid media. The optical absorption and the photoluminescence spectra of the GaAs and CdS colloidal QDs have been investigated experimentally and theoretically. The con…
The structure, the frequencies of the normal vibrations, and the absolute intensities of the bands in the IR and Raman spectra of 9,10-anthraquinone and its four symmetrical isotopomers are calculated in terms of the DFT/B3LYP method with the 6-31G(d) basis set. The effective harmonic force field of 9,10-anthraquinone…
This paper provides data on four commercial tree retardant crosslinked polyethylene (TR-XLPE) and one cross-linked polyethylene (XLPE) insulated 15 kV cables supplied by three manufacturers. The cables have "super-smooth" conductor shields and "extra-clean" insulation and insulation shields. AC and impulse voltage bre…
This study was part of a larger effort called the transient dendritic solidification experiment (TDSE), which uses the well known Clapeyron effect to study transient effects in dendritic solidification. The transient behaviour was studied between well defined steady states using pressure mediated changes since it is a…
Abstract Sheet‐like calcite array and stable vaterite were synthesized by bio‐mimetic supported liquid membrane system under different reaction conditions. Both of the FTIR spectra of products showed narrower peak at 1418 cm −1 than that of bulk CaCO 3 , and that of vaterite has a split in this peak.
The deformation behavior of boron‐ and carbon‐doped β‐silicon carbide (B,C‐SiC) with an average grain size of 260 ± 18 nm containing 1 wt% boron was investigated by compression testing at elevated temperatures. Extensive grain growth during deformation was observed. The stress–strain curves were compensated for grain…
N3 center luminescence quenching by the main types of defects (A and B1) related to nitrogen impurity in natural diamond was studied by monitoring the luminescence yield and using the Raman scattering intensity as a measure of the exciting radiation intensity. The luminescence yield from the N3 centers decreases by a…