Materials Literature
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Densely packed and ordered cobalt nanowire (NW) arrays with aspect ratios (wire length/diameter) varying between 5 and 250 have been fabricated via electrodeposition into alumina templates. The wire length and diameter were controlled by monitoring the total deposited charge or by adjusting the template pore size, res…
Au contacts were deposited on n-type ZnO single crystals with and without hydrogen peroxide pretreatment for the ZnO substrate. The Au/ZnO contacts fabricated on substrates without H2O2 pretreatment were Ohmic and those with H2O2 pretreatment were rectifying. With an aim of fabricating a good quality Schottky contact,…
Successful high-temperature photonic structure design requires a thorough theoretical understanding in several disciplines. In this review, we examine many theoretical questions, as well as published examples of these structures. Research on this topic started with studies of Bragg mirrors, and progressed rapidly as a…
First described in 2000, nephrogenic systemic fibrosis (NSF)/nephrogenic fibrosing dermopathy (NFD) is a recently defined and sometimes fatal condition that, so far, has occurred only in people with some degree of renal failure, either during the conservative phase of chronic renal disease, the dialysis phase, or the…
New organic nonlinear optical configurationally locked polyene (CLP) crystals based on 3,5-dimethyl-2-cyclohexen-1-one have been designed and their supramolecular organization investigated. Acentric single crystals 2-(5-methyl-3-(4-(pyrrolidin-1-yl)styryl)cyclohex-2-enylidene)malononitrile (MH2) of large sizes with a…
Phases of variable composition K1−x A1−x R1+x (MoO4)3) (0 ≤ x ≤ 0.2–0.6), where A = Ni, Mg, Co, or Mn and R = Yb, Lu, or Sc, which crystallize in a NASICON-type structure (space group R $$ \bar 3 $$ c) were synthesized by solid-phase reactions. Their crystal parameters were calculated, and IR and Raman spectra describ…
Abstract On treatment of allylphenylsilanes with t-BuOK and 18-crown-6 in DMSO, isomerization of the olefinic double bond and subsequent substitution of the phenyl group with a hydroxy group took place smoothly to afford alkenylsilanol derivatives in good yields. The reaction mechanism was investigated using 18O-label…
In this study, composites were made with wood sawdust residues and a polyolefin. Experiments were carried out in order to analyze different parameters for processing the composites. The parameters analyzed were the sawdust/polymer ratio and the type of coupling agent. The sawdust and the polymer were mixed in a single…
Abstract We show for the first time, a novel optically written bistable cholesteric display using a simple electrode structure and reversible photo addressable azo binaphthyl chiral materials. These displays are inherently high resolution, require no drive electronics and can be made flexible.
INSITE™ catalyst technology from the Dow Chemical Company is used to produce polyolefin elastomers having low crystallinity that can be melt‐spun into fibers. DOW XLA fiber is a unique, elastic fiber that is olefin‐based and designed for durable, comfortable stretch performance with excellent heat and chemical resista…
This article investigates plasma treatment of vertically aligned multiwall carbon nanotube (CNT) films in different plasma environments for modification of surface chemistry and morphology. The surfaces of the CNTs were functionalized with a pulsed dc plasma treatment, where the power was directly applied to the nanot…
The experimental investigation of low-frequency noise properties in new materials is very useful for the understanding of the involved physical transport mechanisms. In this paper it is shown that, when contact noise is present, the experimental values of the normalized Hooge parameter show a fictitious linear depende…
Abstract The effect of sonochemical reactors (SCR) technology upon the degradation of reactive yellow dye has been studied and reported here. Sonochemical reactors (ultrasound irradiation) produce strong cavitation in aqueous solution causing shock wave and reactive free radicals by the violent collapse of the cavitat…
Phase transitions in thin epitaxial films of BaTiO3 are described phenomenologically in terms of Landau potentials with sixth-and eighth-order terms. It is established that the phase diagram depends on the electrostrictive constant Q 12. The phase diagrams calculated for different values of Q 12 available in the liter…
Mn-doped CdSe nanocrystals encapsulated in carbon (Cd 1− x Mn x Se @ C) were synthesized by the one-pot RAPET (reaction under autogenic pressure at elevated temperature) approach. The nanocrystal core was 27–51 nm encapsulated by a 9–18 nm carbon shell, as evidenced from electron microscopic analysis. The efficient re…
Transformers are normally designed and built for utilizing at rated frequency and prefect sinusoidal loads. Supplying non-linear loads by transformer leads to higher losses, early fatigue of insulation, and reduction of the useful life of transformer. To prevent these problems rated capacity of transformer supplying n…
To identify the chemical modifications along nuclear tracks in poly(allyl diglycol carbonate) (PADC), we have made a series of Fourier transform infrared (FT-IR) measurements for films with a thickness of about 3 µm that have been exposed to C, Ne, Ar, and Fe ions in air. The amount of carbonated ester bonds lost due…
Thermoplastic polyurethane elastomer/carbon nanotubes nanocomposites were prepared by melt mixing process and the influence of surface functionalization of carbon nanotubes on the properties of the nanocomposites was investigated. Improvement of tensile modulus was observed by the addition of functionalized carbon nan…
In this work we describe the observations of structural transitions in ferronematics based on the thermotropic nematics 6CHBT (4-trans-4'-n-hexyl-cyclohexyl-isothiocyanato-benzene). The ferronematic droplets were observed in solutions of nematogenic 6CHBT dissolved in phenyl isocyanate and doped with fine magnetic par…
When a liquid drop is confined between an elastic plate and a rigid substrate, it spreads spontaneously due to the effects of interfacial forces, eventually reaching an equilibrium shape determined by the balance between elastic and capillary effects. We provide an analytical theory for the static shape of the sheet a…