Materials Literature
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We demonstrated for the first time that nonionic surfactants such as T-80 not only act as stabilizing or protecting agents, but also can act as reducing agents for a facile “one-pot” synthesis of gold nanoparticles in an aqueous medium with tunable size at ambient conditions.
The purpose of this paper is to study the effect of insulator dimensions as well as applied water conductivity on flashover voltage under icing conditions, using a dynamic arc model. The electrical performance of several insulators with various diameters and dry arcing distances were evaluated using this model. Moreov…
Poly(vinyl chloride) and acrylonitrile‐butadiene‐styrene terpolymer blends made via melt blending were studied with respect to property enhancement, morphology, and physicochemical characterization. Blends were characterized by various thermal, morphological, and spectro‐chemical methods of analysis. Two distinct glas…
Article THE DISCOVERY OF NON-CHROMATE CORROSION INHIBITORS FOR AEROSPACE ALLOYS USING HIGH-THROUGHPUT SCREENING METHODS was published on December 1, 2007 in the journal Corrosion Reviews (volume 25, issue 5-6).
Abstract Isotactic polypropylene (PP) nanocomposites containing 0.1, 0.3, 0.5 and 1.0 wt % silver (Ag) nanoparticles were prepared via melt compounding in a twin-screw extruder followed by injection molding The effects of the Ag nanoparticle additions on the structure and mechanical behavior of PP were studied using D…
Numerous rare and new mineral species are synthesized during the process of pyrometamorphism (Gross, 1977; Chesnokov et al., 1987; Chesnokov and Shcherbakova, 1991; Chesnokov, 1999), including silicooxides, chloride-, fluoride, and sulfate-silicates, carbonate-sulfides, chloride-oxides, etc. Having made sense of numer…
YCuOSe was prepared by solid-state reaction, and its wide gap semiconducting properties were examined. The single phase of YCuOSe was obtained in a limited temperature range around 750°C and decomposed into Y2O2Se and Cu2Se at higher temperatures. The obtained YCuOSe sample showed a p-type semiconducting behavior with…
In in vitro assays, a chitosan polymer caused differential growth inhibition of the following pathogens isolated from tobacco: Phytophthora parasitica Dastur var. nicotianae (Ppn), Pythium aphanidermatum (Edson) Fitzp, Rhizoctonia solani Kühn, and Sclerotium rolfsii Sacc. The most sensitive were P. aphanidermatum and…
An efficient and practical method for the synthesis of sterically hindered aliphatic/aromatic 1,3‐diketones via coupling of ketones with esters using potassium tert‐butoxide is described. The protocol requires milder operating conditions, and the products are obained in good to excellent yields.
Dilute nitrides such as InAsN alloys represent a new class of highly mismatched semiconductors alloys, which have recently attracted strong attention due to their unique physical properties. In this paper we present computed structural, thermodynamic, and energetic characteristics of the dilute InAsN alloys. We found…
Abstract-The high-power piezoelectric characteristics in h001i oriented ceramics of bismuth layer structured ferroelectrics (BLSF), SrBi(2)Nb(2)O(9) (SBN), (Bi,La)(4)Ti(3)O(12) (BLT), and CaBi(4)Ti(4)O(15) (CBT), were studied by a constant voltage driving method. These textured ceramics were fabricated by a templated…
In this paper, a model based on dynamic electric field analysis has been developed to predict the flashover voltage of the ice-covered HV insulators, under dc voltage. The potential and electric field calculation models before and after air gap breakdown are built respectively based on finite element method (FEM). The…
Abstract The thermal conductivity ( κ ), specific heat ( C p ) and the resistivity ( ρ ) of a single nickel nanowire have been measured in the temperature range from 4 to 300 K by means of the “self heating 3ω” technique. Starting with a 100 nm nickel film grown on a Si/Si 3 N 4 substrate by thermal evaporation, a sus…
Abstract Ferric illite in the Neoproterozoic Penganga Group, southern India, occurs in a lenticular unit of reworked arkoses conformably enclosed in carbonate mudstones, deposited in a shelf-margin carbonate slope setting influenced by deep marine sediment gravity flows. The structures and textures of the arkoses sugg…
Metamaterials with isotropic property have been shown to possess novel optical properties such as a negative refractive index that can be used to design a superlens. Recently, it was shown that metamaterials with anisotropic property can translate the high-frequency wave vector k values from evanescence to propagating…
A cross-spacer phase change memory (PCM) cell with ultra-small lithography-independent contact area for reduced writing current has been successfully demonstrated. By crossing the spacer sidewalls of phase change and heater material, a small contact area of ~1,000 nm2with 0.23 mA reset current is therefore obtained. T…
The dielectric response of a compositionally graded lead zirconate titanate (PZT) structure prepared by pulsed laser deposition was studied as a function of frequency and temperature (from room temperature up to 419 °C) using impedance spectroscopy. The analysis of combined impedance and modulus spectroscopy, as well…
Predictive understanding of how the folded, functional shape of a native protein is encoded in the linear sequence of its amino acid residues remains an unsolved challenge in modern structural biology. Antiparallel four-stranded coiled coils are relatively simple protein structures that embody a heptad sequence repeat…
The possibility to image the local permittivity in giant-κ dielectrics by scanning probe microscopy was demonstrated. In particular, the microstructure and the dielectric properties of CaCu3Ti4O12 (CCTO) films grown on (001) LaAlO3 substrates were studied. CCTO amorphous layers obtained by metal-organic chemical vapor…
The face-centered cubic (fcc) type magnesium-zirconium hydride (Mg0.82Zr0.18Hx) was synthesized by means of the ultrahigh pressure (UHP) technique, which could generate 8 GPa of hydrogen pressure. The differential scanning calorimeter (DSC) measurements indicated that the fcc phase exhibited reversible hydrogen releas…