Materials Literature
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Micrometer-long gold nanowires were fabricated via self-assembly. Diblock copolymer films served as templates for the selective adsorption of 10 nm gold nanoparticles from solution to form well-defined nanostructures. An oxygen plasma treatment induced aggregation of the nanoparticles and the formation of continuous g…
We report a kind of multiferroic and multifunctional composite with Pb(Zr,Ti)O3 rod arrays embedded in a ferromagnetic medium of (Tb,Dy)Fe2∕epoxy. The composite structure is similar to that of 1–3-type piezoelectric composites with Pb(Zr,Ti)O3 rod arrays embedded in an inert epoxy for already commercial applications a…
Abstract The Ritter reaction of plant oil triglycerides (such as soybean and sunflower oil) with acrylonitrile was used to introduce acrylamide functionality on the triglyceride. Acrylonitrile and triglycerides were reacted in the presence of H 2 SO 4 , and acrylamide derivatives were obtained in yields of 45 and 50%…
This work presents the OK- and TiL3,2-edge x-ray absorption near-edge structure (XANES) spectra of PbxSr1−xTiO3 (PxSTO) and BaxSr1−xTiO3 (BxSTO) compounds with various Pb and Ba concentrations. The result provides direct evidence that the Pb–O bonding strongly affects O2p–Ti3d hybridization in the TiO6 octahedron of P…
This paper proposes a circuit model for the transient period of inrush current in a transformer. The magnetizing inrush model is developed from the structural parameters of the transformer. In the analysis of the magnetization curve, the relationship between the magnetic flux density and magnetic field intensity diffe…
Abstract Phosphorus‐containing epoxy systems were prepared from isobutylbis(hydroxypropyl)phosphine oxide (IHPO) and diglycidyl ether of bisphenol A (DGEBA). Diethyl‐ N,N ‐bis(2‐hydroxyethyl) aminomethyl phosphonate (Fyrol 6) could not be incorporated into the epoxy backbone by a reaction with either epichlorohydrin o…
A /spl mu/trench Phase-Change Memory (PCM) cell with MOSFET selector and its integration in a 4-Mb experimental chip fabricated in 0.18-/spl mu/m CMOS technology are presented. A cascode bitline biasing scheme allows read and write voltages to be fed to the addressed storage elements with the required accuracy. The hi…
Highly transparent and conductive In2O3 and ZnO films containing different doping elements such as Ti, Mo, Zr, Nb, Ta, W (for In2O3), and B (for ZnO) have been prepared by reactive-environment, hollow cathode sputtering (RE-HCS). The use of Nb and W as effective dopants is reported for the first time. Metallic targets…
The zinc doped indium oxide (IZO) films deposited with various sputter parameters such as, film thickness ranging from 200to500nm, O2∕Ar ratio ranging from 0% to 12%, and sputter power ranging from 100to250W was studied in this work. For a 200nm thick IZO film grown at room temperature in pure argon atmosphere, the re…
An approach for simultaneous measurement of two-dimensional angular distribution of charged particles is proposed. This concerns spherical aberration correction in electrostatic lenses with potential use of a mesh. In an earlier work, an effective use of a spherical mesh has succeeded to obtain a large acceptance angl…
Abstract Dynamic mechanical test methods have been widely employed for investigating the structures and viscoelastic behavior of polymeric materials to determine their relevant stiffness and damping characteristics for various applications. Randomly oriented short banana/sisal hybrid fiber–reinforced polyester composi…
Abstract In this work, various polydimethylsiloxanes (PDMS) are incorporated with isophorone diisocyanate (IPDI), 2,2‐bis(hydroxymethyl)propionic acid (DMPA), and poly(tetramethylene oxide) (PTMO) by the prepolymer process to synthesize a series of siloxane‐modified polyurethane dispersions (PUDs) with 35 wt % solid c…
This paper presents the analysis of ultrasonic signals by the partial discharge in a model transformer as well as by corona in the air at a shielded high-voltage laboratory. In addition, various noises onsite, a 345-kV substation, were measured and analyzed, for example, the vibration by core magnetostriction, cooling…
Abstract Flame retardant polypropylene (PP) composites were prepared by combining random polypropylene with uncoated and surface‐treated forms of magnesium hydroxide filler and elastomeric modifiers, with and without maleic anhydride functionalization. Four types of magnesium hydroxide (MDH) with different surface tre…
Umbilical defects were induced in a nematic liquid crystal with negative dielectric anisotropy, confined to Hele-Shaw cells with homeotropic boundary conditions, and their annihilation dynamics were investigated experimentally. Dynamic scaling laws, previously proposed for Schlieren defects, were verified also for ele…
Abstract A series of hyperbranched polymers functionalized with long aliphatic chains has been prepared and characterized. The property of films prepared from these polymers to encapsulate lipophilic polyaromatic pollutants dissolved in water has been established. The level of pyrene and fluoranthene remaining in wate…
Density functional theory (DFT) and time-dependent DFT calculations were carried out to comparatively describe the molecular structures, molecular orbital energy gaps, atomic charges, infrared (IR) and Raman spectra, and UV-vis spectra of PbPc (1), PbPc(alpha-OC2H5)4 (2), and PbPc(alpha-OC5H11)4 (3) {Pc2- = dianion of…
This paper proposes an extension-neural-network (ENN)-based recognition method to identify the partial-discharge (PD) patterns of high-voltage current transformers (HVCTs). First, a commercial PD detector is used to measure the three-dimensional (3D) PD patterns of cast-resin HVCTs, then three data preprocessing schem…
Mixed cationic liposomes composed by different ratios of dimyristoyl-sn-glycero-phosphatidylcoline (DMPC) and a cationic gemini surfactant have been studied by various physicochemical tools as vehicles for m-tetrahydroxyphenylchlorin (m-THPC), a photosensitizer used in photodynamic therapy. Entrapment and location of…
Temperature-modulated differential scanning calorimetry (TMDSC) is used to study the heat capacity ( C p ) of monodisperse polystyrene in the nanocomposites. It is found that the bulk portion of polystyrene in the nanocomposites has a similar temperature range of glass transition behavior as pure polystyrene, while th…