Materials Literature
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Abstract Summary: The theory of lamellar superstructures of an ABC 3‐miktoarm star terpolymer in the conditions corresponding to the strong segregation limit for linear ABC triblock terpolymer has been developed. According to the particular molecular topology (namely, the common junction point for all three blocks), t…
Noise suppression effect of Co-Pd-Al-O nanogranular thin films, which have considerably high permeability up to gigahertz range, was investigated. The films with large variety of electrical resistivity (/spl rho/) from 10/sup 2/ to 10/sup 7/ /spl mu//spl Omega//spl middot/cm were prepared by reactive sputtering method…
The reaction of ethanol has been investigated on the surface of Au–Rh/CeO2 by temperature programmed desorption (TPD), infrared spectroscopy and in steady state conditions. Most of adsorbed ethanol is found in the form of ethoxides (ν O–C at 1045 and 1096 cm−1). Heating the surface resulted in the transformation of et…
Fluorescent immunoconjugates prepared with the europium chelate BHHCT (4,4'-bis(1'',1'',1'',2'',2'',3'',3''-heptafluoro-4'',6''-hexanedion-6''-yl)-chlorosulfo-o-terphenyl) have previously been reported as suitable labels for time-resolved fluorescence applications. BHHCT is limited by a tendency to destabilize immunog…
We develop a novel approach that combines the ideas of inherent structures, free-volume theory and geometrical packing properties to derive a general theory to understanding the complex dynamics of glass-forming liquids, granular packings and amorphous solids. We show that the thermodynamical properties of these syste…
The synthesis and characterization of a new series of AABB-type polyamides based on l -arabinitol and xylitol are described. These linear polyamides were obtained by reaction of the aldaric acids or aliphatic dicarboxylic acids, with sugar-based diamine or aliphatic diamines. The pentaric diacids were activated as the…
pH and salts have a marked effect on the stability, structure, and function of many globular proteins due to their ability to influence the electrostatic interactions. In this work, calorimetry, CD, and fluorescence studies have been carried out to understand the pH-dependent conformational changes of the two-domain p…
The structure of pentaerythritol tetranitrate (PETN) reductase in complex with the nitroaromatic substrate picric acid determined previously at 1.55 A resolution indicated additional electron density between the indole ring of residue Trp-102 and the nitro group at C-6 of picrate. The data suggested the presence of an…
Ternary cadmium selenium telluride quantum dots (CdSe(1-x)Tex, x = mole fraction of tellurium) have been prepared for potential use as constant-size biolabels with tunable fluorescence emission in the far-red and near-infrared (650-850 nm) spectral range. In contrast to particle size tuning reported for binary dots, w…
Abstract Four models for the component dynamics in polymer blends are briefly reviewed, with an emphasis on their ability to describe anomalous segmental relaxation behavior, secondary relaxations in blends, mixtures which include small molecules, and properties in the concentration limits of probe molecules and neat…
For materials such as stainless steel, it is well known that the surface condition (roughness) can have an effect on corrosion loss or pitting as a function of exposure time. Although some isolated observations exist of this effect for mild steel under marine immersion, there appears to have been no systematic investi…
Self-assembled copper nanowires were deposited on native oxide Si(100) substrates using glancing angle deposition with and without substrate rotation. Wire morphology, texture and crystallographic orientation are strongly dependent on the deposition parameters. A method for determining the preferred crystal orientatio…
Carbon nanotubes (CNTs), a new type of carbon material, show exceptional adsorption capability and a high adsorption efficiency for the removal of chromium(VI) ions from water over a broad pH range extending from 4.0 to 7.5. The largest adsorption capacity for CNTs occurred at pH 7.5 and attained a value of 20.56 mg/g…
The electrical response to O3 of 150-nm-thick carbon nanotube (CNT) thin films prepared by radio frequency-plasma enhanced chemical vapor deposition has been investigated at different operating temperatures starting from the room temperature. The interaction between ozone molecules and a carbon nanotube film is studie…
We present a finite-element method for numerical calculation of electromagnetic fields in silicon steel that takes into account the effect of mechanical stress on the steel's mechanical properties. The effect of the mechanical stress is considered in terms of the magnetic permeability in each element. To evaluate the…
Ultrasonic attenuation in copper and copper-aluminum samples is measured as a function of frequency and average grain size. At low frequencies the attenuation scales quadratically with the frequency and linearly with average grain size. In addition, there is a large difference in attenuation between powder metallurgy…
Thin (/spl sim/2000 /spl Aring/) films of Fe/sub 60/Co/sub 40/ have been prepared by sputtering on Si/SiO/sub 2/, Si/AlO/sub x/, AlTiC/AlO/sub x/, AlTiC/AlO/sub x//NiFe, and AlTiC/AlO/sub x//NiFeCr substrates using an alloy Fe/sub 60/Co/sub 40/ target. The structure of the films was characterized by means of X-ray dif…
Developing the texture of ceramics is one of the effective ways for improving properties. Although the magnetic susceptibility of nonmagnetic materials is very small, there is a possibility to control the crystal orientation using a high magnetic field due to a magnetic anisotropy. In this study, Si 3 N 4 ceramics wer…
The process of silver intercalation under a graphite monolayer (GM) grown on the (111) nickel single-crystal face, GM/Ni(111), is studied. The experiments were conducted in ultrahigh vacuum. The systems were formed in situ in a vacuum chamber under direct monitoring of each stage in the formation of the systems by ang…
Using an organometallic precursor, tetrakis(trifluorophosphine)platinum [Pt(PF3)4], electron-beam induced deposition of Pt thin films on a Cr-coated Si(100) substrate was investigated. Based on Auger electron spectroscopy, the Pt content reached 60 at. % for a 3 kV e-beam flux of 2.1×10−2 A cm−2, a precursor pressure…