Materials Literature
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Oxyfluoride glasses were developed with composition 30SiO2⋅15AlO1.5⋅28PbF2⋅22CdF2⋅(4.8−x)GdF3⋅0.1NdF3⋅0.1HoF3⋅xYbF3 (x=0, 0.1, 0.2, 0.5, 1, 2, 3, 4, and 4.8) in mole percent. Powder x-ray diffraction analysis revealed that the heat treatments of the oxyfluoride glasses at 450 °C for 0.5 h cause the precipitation of Nd…
The results of the studies of structural, electrical, and thermoelectric properties of binary skutterudite CoSb3 thin films are presented. The n-type films were prepared without intentional doping on oxidized Si(100) and ceramic Al2O3 substrates using magnetron dc sputtering technique. The electron probe microanalysis…
<div class="htmlview paragraph">This investigation reports engine performance, combustion characteristics, and exhaust emissions with alternative diesel fuels of blends of vegetable oil and various fuel additives (fuel improving agents). To improve the oil viscosity and distillation characteristics, the study us…
An efficient procedure is described for catalyst recycling and easy product isolation in alkene epoxidation with hydrogen peroxide catalyzed by water-soluble iron(III) porphyrins in environmentally benign and ambient temperature ionic liquids.
A system for the automatic categorization of the results of crystallization experiments generated by robotic screening is presented. Images from robotically generated crystallization screens are taken at preset time intervals and analyzed by the computer program Crystal Experiment Evaluation Program (CEEP). This progr…
(CoFe)–Si–O/Si–O multilayer nanogranular magnetic thin films for GHz rf circuits were designed and fabricated on SiO2/Si substrates using inductively coupled rf sputtering. A multilayer structure consisting of a CoFe ferromagnetic mononanogranular layer covered with an atomic-order SiO2 amorphous phase and a nanometer…
The growth and structure of fullerene-like CNx films produced by laser ablation of graphite in low pressure nitrogen were investigated. Deposition conditions were selected based on investigations of CN and C2 concentration at the condensation surface, vibrational temperature of CN radicals, and kinetic energies of ato…
With modern detectors and synchrotron sources, it is now routine to collect complete data sets in 10-30 min. To make the most efficient use of these resources, it is desirable to automate the collection and processing of the diffraction data, ideally to a level at which multiple data sets can be acquired without any i…
We suggest a model of the atomic and electronic processes responsible for the so-called 110 and 325 °C thermoluminescence (TL) peaks, including predose behavior, and for the room temperature optically stimulated luminescence (OSL) of quartz. Our model is based on defects and defect processes typical of those known fro…
We report, for the first time, deviations from the Summerfield scaling in the ac conductivity spectra of single ion conducting glasses. In contrast to the extensively studied borate and germanate glasses, the conductivity isotherms of alkali tellurite glasses do not superimpose upon application of the Summerfield scal…
Fe–Ga alloys with compositions near 27.5 at. % Ga (26–29 at. %) can be heat treated to obtain ordered phases based on α″ (ordered bcc), D019 (ordered hexagonal), and L12 (ordered fcc) structures. This work presents an evaluation of how the different ordering treatments influence the magnetostriction in cast polycrysta…
${\mathrm{Pd}}_{43}{\mathrm{Ni}}_{10}{\mathrm{Cu}}_{27}{\mathrm{P}}_{20}$ has been investigated in its equilibrium liquid state with incoherent, inelastic neutron scattering. As compared to simple liquids, liquid ${\mathrm{Pd}}_{43}{\mathrm{Ni}}_{10}{\mathrm{Cu}}_{27}{\mathrm{P}}_{20}$ is characterized by a dense pack…
Coupling phenomena between artificial left-handed (LH) transmission lines are explored on the basis of a transmission line approach of LH materials. A LH forward coupler in the form of an ideal lumped-element ladder network is presented and is shown to exhibit strong forward coupling that increases with decreasing of…
Previous theoretical simulation and experimental studies have indicated that particles with a short-ranged attraction exhibit a range of dynamical arrest phenomena. These include very pronounced reentrance in the dynamical arrest curve, a logarithmic singularity in the density correlation functions, and the existence…
We have studied the thickness dependence of the magnetotransport properties of ${\mathrm{La}}_{2/3}{\mathrm{Ca}}_{1/3}{\mathrm{MnO}}_{3}$ thin films epitaxially grown on ${\mathrm{SrTiO}}_{3},$ ${\mathrm{LaAlO}}_{3},$ and ${\mathrm{NdGaO}}_{3}$ single-crystalline substrates. When thickness decreases, a global disrupti…
Abstract The effect of the chain constraint on the glass‐transition temperature of polystyrene (pS) was studied in the context of polymer tethering to curved surfaces. The synthesis and characterization of silica‐ graft ‐polystyrene (SiO 2 ‐ g ‐pS) hybrid nanoparticles is reported. Silica nanoparticles possessing cova…
The approaches that form the basis of automated structure solution in SOLVE and RESOLVE are described. The use of a scoring scheme to convert decision making in macromolecular structure solution to an optimization problem has proven very useful and in many cases a single clear heavy-atom solution can be obtained and u…
Abstract The morphologies and crystalline structures of melt‐crystallized ultrathin isotactic poly(1‐butene) films have been studied with transmission electron microscopy and electron diffraction. It is demonstrated that a bypass of form II crystallization can be achieved with an increase in its crystallization temper…
The magnetization of an ensemble of isolated lead grains of sizes ranging from below 6 nm to 1000 nm is measured. A sharp disappearance of Meissner effect with lowering of the grain size is observed for the smaller grains. This is a direct observation by magnetization measurement of the occurrence of a critical partic…
The World Wide Web (WWW) is a wonderful tool to provide users with documentation and tools that make the preparation and running of an experiment a little easier. We present a set of tools that allow one to estimate the activation of a sample in the neutron beam, or to calculate the absorption of a sample. Ever tried…