Materials Literature
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The recently discovered fine structure of the morphotropic phase boundaries in highly piezoelectric mixture compounds ${\mathrm{PbZr}}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}{\mathrm{O}}_{3}$ (PZT), $\mathrm{Pb}({\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}{)}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}{\mathrm{O}}_{3}$ (PMN-PT), and $\…
The magnetic susceptibility and magnetization of two layered $S=\frac{1}{2}$ Heisenberg antiferromagnets with moderate exchange are reported. The two isostructural compounds, $(2\ensuremath{-}\mathrm{amino}\ensuremath{-}5\ensuremath{-}\mathrm{chloropyridinium}{)}_{2}{\mathrm{CuBr}}_{4}$ $[(5\mathrm{C}\mathrm{A}\mathrm…
The discovery of high temperature superconductors (HTS) has led to understanding that, in order to explain and utilize the phenomenon, completely new physical approaches should be introduced at all scales: microscopic, mesoscopic, macroscopic. Leaving first two scales beyond the scope of the present paper we focus in…
The piezoresistive response of granular metals under uniaxial strain is strongly dependent on the concentration of the conducting phase. Here we show that the piezoresistive anisotropy is reduced as the system approaches its percolation thresold, following a power law behavior in the critical region. We propose a simp…
Peritoneal dissemination in gastric cancer is a common fatal clinical condition with few effective therapies available. We studied the therapeutic effect of a tumor-targeting drug delivery system that uses cisplatin-encapsulated and Tf-conjugated PEG liposomes (Tf-PEG liposomes) in nude mice with peritoneal disseminat…
The ultimate strength of carbon nanotubes is investigated by large-scale quantum calculations. While the formation energy of strain-induced topological defects determines the thermodynamic limits of the elastic response and of mechanical resistance to applied tension, it is found that the activation barriers for the f…
Molecular inorganic clusters, which are stable under ambient conditions, can be used as convenient single-source precursors for controlled preparation of 2−9-nm CdSe and CdSe/ZnS nanocrystals and 2−5-nm nanocrystals of ZnSe. The use of a cluster-based single-source precursor allows nanomaterial growth to be initiated…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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…
Polycrystalline BaTiO 3 /Ba 0.2 Sr 0.8 TiO 3 multilayer thin films were fabricated by pulsed laser deposition onto Pt/Ti/SiO 2 /Si substrates with various stacking periodicities. The dielectric constant of the films was obviously enhanced with the decrease of the individual layer thickness, while the dielectric loss w…
A strong effect of buoyancy-driven convection on the diameter of single-walled carbon nanotubes (SWCNTs) has been demonstrated for the first time. Because of favourable convection, SWCNTs with average diameters of 0.8 nm have been produced using the electric arc technique in the vertical configuration. Up to the prese…
The synthesis of a novel epoxide inhibitor 6 of meso-DAP epimerase was achieved. A new and convenient assay for meso-DAP epimerase was devised which is a considerable improvement on previously reported assay methods. This assay was used to determine the inhibitory properties of 6. The epoxide 6 shows limited competiti…
The preparation of ceria and ceria–zirconia supported ruthenium catalysts was optimized in order to get well-dispersed metal particles. The influence of the preparation method and the treatment conditions on the final morphology of the catalyst was investigated. Ceria-supported catalysts, prepared by incipient wetness…
First-principles total-energy calculations on the tetragonal states of bulk elemental palladium have been made with a full-potential electronic structure program with both the local-density approximation (LDA) and the generalized gradient approximation (GGA). The unique path through tetragonal states produced by epita…
Missing-row reconstructions on Au(110) immersed in electrolytes have been studied by in situ reflectance anisotropy spectroscopy. Transitions between the 1 x 3, 1 x 2, and 1 x 1 surface structures were monitored as a function of the applied potential. A kinetic model allowed us to reproduce the data satisfactorily. Th…
Three biomimetic models for the binuclear Fe/Cu (heme/trisimidazole) active site of terminal oxidases, such as cytochrome c oxidase and related enzymes, have been prepared. Based upon a tetrakis(aminophenyl)porphyrin core, these models possess a single covalently linked imidazole-bearing tail on one side of the porphy…
NbS2 nanoparticles with a closed cage structure (inorganic fullerene-like phase—IF) were synthesized by reaction between NbCl5 vapor and H2S gas in a reducing atmosphere at 400 °C, and subsequent annealing under a H2S/H2 atmosphere at 550 °C. Following the synthesis, the nanoparticles were found to have a large excess…
The equilibrium structure of decoration lattices composed of colloidal particles adsorbed on periodic stripe-patterned substrates is calculated as a function of the stripe width and separation and for different interparticle interactions. Due to a competition of length scales, a wealth of different stable decoration l…
Two series of novel rod-like compounds containing Schiff-base and naphthalimide units were synthesized. The liquid crystalline and amorphous phases of these compounds have been studied by differential scanning calorimetry (DSC), polarizing microscopy and X-ray diffraction. It was found that compounds 1A, 2A and 3A wit…
Nano-ZnS was deposited into porous silicon. By varying the concentration of Zn2+ ion solution during nano-ZnS formation, the amount of nano-ZnS in porous silicon host can be controlled. The doped porous silicon exhibited a gradual shift in its photoluminescence peak from red to blue as a function of the nano-ZnS cover…
The atomic structure of a precursor-derived amorphous ceramic with the composition ${\mathrm{Si}}_{37}{\mathrm{C}}_{32}{\mathrm{N}}_{31}$ and a density of $2.4 \mathrm{g}/{\mathrm{cm}}^{3}$ was modeled using a density-functional-based molecular dynamics simulation. Three different model structures were generated, and…