Materials Literature
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Enhancement of dielectric properties has been demonstrated in BaTiO3 (BTO)/SrTiO3 (STO) strained artificial lattice. Large variation of lattice distortion in the consisting BTO and STO layers was achieved by varying a stacking sequence of BTO and STO layers. From this strain manipulation, it is found that BTO and STO…
Abstract Sol‐gel surface deposition of a hydrophobic polysiloxane coating on wood was accomplished by using a mixture of a low molecular weight multifunctional alkoxysilane, methyltrimethoxysilane (MTMOS), and a high molecular weight multifunctional alkoxysilane, hexadecyltrimethoxysilane (HDTMOS). Investigation of th…
The effect of Mn substitution on ferroelectric and antiferromagnetic properties of the Bi0.9La0.1Fe1−xMnxO3 system has been studied. It is seen that, with the increase in Mn content, there is a contraction in unit cell volume. Since the cell volume contraction is isotropic, lattice distortion (c/a) remains the same an…
New biodegradable amphiphilic ABA triblock copolymers consisting of poly(ethylene oxide) (PEO) as the hydrophilic block and poly[( R )-3-hydroxy butyrate] (PHB) as the hydrophobic block were synthesized by coupling two chains of methoxy-PEO-monocarboxylic acid with a low molecular weight telechelic hydroxylated PHB (P…
Synthesis of nano- and microcrystalline sp3-bonded carbon (diamond) with cubic and hexagonal structure by extraction of silicon from silicon carbide in chlorine-containing gases has been reported recently. This process is attractive because it can produce diamond at ambient pressure and temperatures below 1000 °C. No…
The 0.675Pb(Mg1/3Nb2/3)O3–0.325PbTiO3 (PMN–32.5PT) ceramic composition (with 1 wt. % excess PbO) was fiber textured in the 〈001〉 direction by the templated grain growth process using 5 vol % oriented {001}-BaTiO3 platelet crystals as the templates. The templated ceramics annealed at 1150 °C for 5 h attained texture fr…
The color of the emission of zinc gallate (ZnGa2O4) oscillates between ultraviolet and blue by hydrogen ambient reduction and air ambient oxidation heat treatments. The photoluminescence spectra and electron paramagnetic resonance signals show that ultraviolet emission of reduced ZnGa2O4 always accompanies 680 nm emis…
Through introducing the iPP fibers into their supercooled homogeneity matrices, the homogeneity fiber/matrix composites of iPP have been prepared, and the resulting supermolecular structures of iPP matrices induced by their homogeneity fibers as a function of introduction temperature were studied by means of optical m…
Abstract In this study, the effects of batch processing conditions (foaming time and temperature) and blend composition as well as the effect of incorporating wood fiber into the blends on the crystallinity, sorption behavior of CO 2 , void fraction, and cellular morphology of microcellular foamed high‐density polyeth…
Electroplated Cu films with different plating conditions and thicknesses are characterized to study the stress and texture evolution involved in the transition of the microstructure during self-annealing. Grain growth during the process induces stress in the film in the tensile direction. Degradation of the (111) text…
Molybdenum trioxide (MoO 3 ) thin films prepared by cathodic electrodeposition on indium−tin-oxide coated glass substrates from aqueous peroxo-polymolybdate solutions have been studied as a function of sintering temperature (25−450 °C). Cyclic voltammetry, chronopotentiometry, chronoamperometry, and spectroelectrochem…
This paper presents a new approach to controlling shape memory alloy (SMA) actuators with hysteresis compensation by using a neural network feedforward controller and a sliding-mode based robust feedback controller. SMA actuators exhibit severe hysteresis, which is often responsible for position inaccuracy in a regula…
The effects of substrates and solvent on polymer formation, number-average molecular weight (M(n)), polydispersity, and end-group structure for lipase-catalyzed polycondensations were investigated. Diphenyl ether was found to be the preferred solvent for the polyesterification of adipic acid and 1,8-octanediol giving…
We report anisotropic resistivity measurements on a ${\mathrm{La}}_{1.2}{\mathrm{Sr}}_{1.8}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}$ single crystal over a temperature T range from 2 to 400 K and in magnetic-fields H up to 14 T. For $T>~218\mathrm{K},$ the temperature dependence of the zero-field in-plane resistivity ${\en…
The dynamical mean-field method is used to analyze the magnetic transition temperature and optical conductivity of a model for the ferrimagnetic double perovskites such as ${\mathrm{Sr}}_{2}{\mathrm{FeMoO}}_{6}.$ The calculated transition temperatures and optical conductivities are found to depend sensitively on the b…
A type of a composite material is proposed, the microwave permittivity of which changes under the effect of a dc magnetic field applied to the whole composite sample. The composite consists of short ferromagnetic wires embedded into a dielectric matrix. A strong field dependence of the permittivity is seen in the vici…
High-temperature (high-$T)$ and high-electric-field (high-$E)$ effects on $\mathrm{Pb}[({\mathrm{Zn}}_{1/3}{\mathrm{Nb}}_{2/3}{)}_{0.92}{\mathrm{Ti}}_{0.08}]{\mathrm{O}}_{3}$ were studied comprehensively by neutron diffraction in the ranges $300<~T<~550\mathrm{K}$ and $0<~E<~15\mathrm{k}\mathrm{V}/\mathrm{…
Binary colloidal suspensions are assembled into planar superlattices using ac electric fields. Either triangular or square-packed arrays form, depending on the frequency and relative particle concentrations. The frequency dependence is striking since superlattices develop at low and high frequencies but not at interme…
The role of electron acceptors in semiconductor photocatalysis is critical in determining the overall photoefficiencies, kinetics, and mechanisms. Polyoxometalates (POMs) are efficient electron acceptors and carriers in TiO 2 photocatalysis. The electron transfer mediating behaviors of a POM (PW 12 O 40 3- /PW 12 O 40…
We report on the growth, structural as well as magnetic characterization of (Ga,Mn)N epitaxial layers grown directly on 4H–SiC(0001) by reactive molecular-beam epitaxy. We focus on two layers grown under identical conditions except for the Mn/Ga flux ratio. Structural characterization reveals that the sample with the…