Materials Literature
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The magnetic phase transition and magnetocaloric effect are investigated on ε-(Mn0.83Fe0.17)3.25Ge compound. A large positive magnetic entropy change ΔSM is observed, which is accompanied with a field-induced metamagnetic transition from a collinear to a triangular antiferromagnetic configuration in this antiferromagn…
The authors introduce variable liquid crystal (LC) pretilt angles via ion beam (IB) irradiation of silicon carbide (SiC) layers of various compositions. To control the composition of the SiC layer, the authors altered the rf power ratio between the graphite target and silicon target. The pretilt angle of the silicon-r…
Abstract Mechanically strong and flexible strips of cellulose acetate were used to support a thin coating of poly(3,4 ethylenedioxythiophene) : poly(styrene sulfonic acid) PEDOT : PSS, an intrinsically conducting polymer (ICP), formulated with an aqueous dispersion of judiciously chosen copolymer of vinyl acetate and…
Abstract Blends of polypropylene (PP) and silicone masterbatch (SMB PP )—a commercial formulation consisting of an ultrahigh molecular weigh polydimethylsiloxane (PDMS) dispersed in PP—were prepared by melt mixing in an internal mixer. Four binary blends with different SMB PP content and two ternary blends containing…
Detailed field- and temperature-dependent ac susceptibility data on single-crystal ${\mathrm{La}}_{0.73}{\mathrm{Ba}}_{0.27}\mathrm{Mn}{\mathrm{O}}_{3}$, while confirming the applicability of Heisenberg model exponents, indicate that the associated scaling law extends over a wide region of the $(H,T)$ plane around ${T…
Abstract This paper describes the synthesis and characterization of a series of TRITON™ X‐based surfactants with a predominantly alkyl phenol ethoxylate (APE) backbone and carboxylic or amino chain ends. Three carboxylic acid‐containing TRITON X (or APE)‐derivatives, [OPE2‐COOH], [OPE5‐COOH], and [OPE10‐COOH], were pr…
The authors employ a rigorous theory to study the electromagnetic resonances in double split rings of circular cross sections. The inter-ring interactions split each single-ring mode to two modes with different symmetries, and the bianisotropy of each mode is suppressed as two rings approach. They obtain analytical ex…
The influence of high electric fields on the charge stripe order in ${\mathrm{Nd}}_{1.67}{\mathrm{Sr}}_{0.33}\mathrm{Ni}{\mathrm{O}}_{4}$ was studied by means of simultaneous hard x-ray diffraction and electrical transport experiments. Direct measurements of the charge stripe satellite peaks in zero and high electric…
Abstract N ‐(Hydroxymethyl)carbazole (MeOHCz) was electrocoated on carbon fiber micro electrodes (diameter ∼ 7 μm) in different solvents by cyclovoltammetric method as thin film (0.17–2.73 μm). Surface characterization of electrocoated poly[ N ‐(hydroxymethyl)carbazole] of carbon fiber microelectrode (CFME) was perfor…
Abstract The development of the multiphase morphology of uncompatibilized blends of poly(butylene terephthalate) (PBT) and acrylonitrile–butadiene–styrene terpolymer (ABS) and PBT/ABS blends compatibilized with methyl‐methacrylate glycidyl‐methacrylate (MMA‐GMA) reactive copolymers during compounding in a twin‐screw e…
Abstract An experimental approach based on the freezing‐point depression of a solvent in a swollen gel has been developed to characterize the structure of rubber networks. This property depends on the conditions required for the formation of crystalline nuclei, which are limited by the elastomer network restrictions.…
The radio-frequency characteristics of p-type diamond field-effect transistors with hydrogen surface termination were numerically analyzed using an equivalent-circuit model. From the gate-source capacitance (CGS)-voltage (VGS) results extracted from measured s parameters, the authors found a plateau in CGS within a ce…
The kinetics of relaxation and recombination processes of excitons in an epitaxial-grown thick ZnO layer has been examined using time-resolved cathodoluminescence. The unique feature of this technique allows the full analysis of excitation from thermal equilibrium into true steady state and the relaxation back into th…
X-ray analysis of some 1,3-dipyrrolyl-1,3-propanediones synthesized from pyrroles and malonyl chloride derivatives revealed 1D supramolecular networks formed by N-H...O=C interactions in the solid state. Micro- and nanometer-scale morphologies of porous, fibrous, and sheet structures were fabricated by hydrogen-bondin…
The optical properties of PbSe nanocrystal quantum dots (NQDs) were studied as a function of applied hydrostatic pressure over the range from ambient to 5.4GPa. PbSe NQDs exhibit an energy gap that is dominated by quantum confinement. Despite such strong confinement, the authors find that the energy gaps of 3, 5, and…
Abstract Poly(ethylene terephthalate) (PET) fibers were treated with 60 Co‐γ‐ray and grafted with acrylic acid. The resulting fibers were further grafted with chitosan (CS) via esterification. Afterward, hyaluronic acid (HA) was immobilized onto CS‐grafting fibers. The antibacterial activity of CS against S. aureus ,…
This article presents a gripper actuated by a pair of differential shape memory alloy (SMA) springs. The mechanical structure of the gripper includes a pair of fingers, a coupler, a tension rod, a slider, and a frame. An experimental setup of the SMA gripper is established. The SMA actuator is heated by the electric c…
A ballistic strip of graphene (width $W⪢\text{length}$ $L$) connecting two normal metal contacts is known to have a minimum conductivity of $4{e}^{2}∕\ensuremath{\pi}h$ at the Dirac point of charge neutrality. We calculate what happens if one of the two contacts becomes superconducting. While the ballistic conductance…
A combined approach of molecular modeling and experiment has been applied to optimize the electrical conductivity of LaCrO3 by screening all group IIa elements that may partially substitute La. Electronic structures of both doped and undoped LaCrO3 have been calculated and a semiconducting state for M2+-doped LaCrO3 h…
The crystal structure and multiferroic properties of single-phase (Bi0.9La0.1)FeO3–Ba(Fe0.5Nb0.5)O3 ceramics were investigated. The rhombohedral-type structure of 1.0(Bi0.9La0.1)FeO3) was transformed to a monoclinic-type structure for the 0.5(Bi0.9La0.1)FeO3–0.5Ba(Fe0.5Nb0.5)O3) composition. It shows the coexistence o…