Materials Literature
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Abstract 2,6‐Dimethyl phenol dicyclopentadiene dicyanate ester (DCPDCY) was synthesized through the reaction of 2,6‐dimethyl phenol dicyclopentadiene novolac and cyanogen bromide. The proposed structure was confirmed by Fourier transform infrared, mass spectrometry, NMR spectrometry, and elemental analysis. DCPDCY was…
We report the development of conducting polymer electrochemical linear actuators from ionic liquids (as electrolytes) and polyaniline yarns and hollow fibres (as electrode materials). With a yarn-in-fibre configuration, these actuators were simple to fabricate and allowed two-electrode operation without a reference el…
Nanocharacterization is essential for nanoengineering of new types of core-shell (c-s) nanoparticles, which can be used to design new devices for photonics, electronics, catalysis, medicine, etc. X-ray photoelectron spectroscopy (XPS) has been widely used to study the elemental composition of the c-s nanoparticles. Ho…
The carbon nanotube (CNT) is a promising nanomaterial in emitter device applications. However, the self-assembling nature of CNT growth causes fluctuations in length and weak adhesion to substrates even in the morphology of aligned CNTs, whereas CNTs synthesized on an anodic aluminium oxide (AAO) template show uniform…
Thermo-mechanical failure of components in planar-type solid oxide fuel cells (SOFCs) depends strongly on the local temperature gradients at the interfaces of different materials. Therefore, it is of paramount importance to accurately predict the temperature fields within the stack, especially near the interfaces. Bec…
Eleven new complexes, including mono-, heterobi-, and homobimetallic cofacial bisporphyrins, (Pd)H2DPS, (M)H2DPX, (M)H2DPB, (PdZn)DPS, (PdZn)DPX, (Pt)2DPX, (M)2DPB (M = Pd, Pt), and (Pt)P (DPS4- = 4,6-bis[5-(2,8,13,17-tetraethyl-3,7,12,18-tetramethylporphyrinyl)]dibenzothiophene tetraanion, DPX(4-) = 4,5-bis[5-(2,8,13…
Array of macropores filled with electrodeposited Ni was formed on Si substrate applying the novel process, which consists of Si electrochemical etching and Ni electrodeposition using single electrolyte. This electrolyte contained HF as Si dissolution agent and Ni(OSO2NH2)2 4H2O as Ni2+ source for Ni electrodeposition.…
Abstract This article is concerned with the preparation and characterization of composite materials prepared by the compression molding of mixtures of zinc powder and urea–formaldehyde embedded in cellulose powder. The morphologies of the constituent, filler, and matrix were investigated by optical microscopy. The ela…
An approach to distinguish elements with similar atomic numbers in molecules and clusters is presented and applied to experimentally synthesized and structurally characterized mixed-metallic compounds. By first treating a homogenized reference system constructed from the original compound and applying first-order pert…
A self-polymerizable liquid octatetrayne, 1,8-dibutyl-1,3,5,7-octatetrayne, was heated to 80 °C and produced cross-linked poly(1,8-dibutyl-1,3,5,7-octatetrayne) microbeads via suspension polymerization with diameters adjustable from hundreds of micrometers to a few micrometers. Carbon microbeads that may be useful for…
Arsenic doping of ZnO nanowires for building blocks of potential nanoscale photonic devices is reported. It was demonstrated in high-resolution transmission electron microscopy (HRTEM) and Raman spectroscopy that arsenic could be doped into the substitutional sites in ZnO lattice by post-annealing samples grown on GaA…
Abstract Microcellular polymeric materials can be obtained by the polymerization of a high‐internal‐phase emulsion. These materials are good candidates as targets toward inertial confinement fusion. This application requires severe specifications, including a very low density and a small cell size. In this study, we e…
Abstract The kinetics of the thermal and microwave‐assisted oxidative degradation of poly(ethylene oxide) were determined with potassium persulfate as the oxidizing agent. Gel permeation chromatography was used to determine the variation of the molecular weight with time. The degradation was studied as a function of t…
Gels comprised of low-molecular-mass organic gelators (LMOGs), N-alkyl perfluoroalkanamides [F(CF2)(m)CONH(CH2)(n)H; FmNHn], and several perfluorinated liquids are described. The gelation ability of the amides has been compared to that of two analogous alkyl perfluoroalkanoates. The properties of these gels have been…
We numerically demonstrate that a planar waveguide in which the inner layer is a gas with refractive index n0 = 1, sandwiched between two identical semi-infinite layers of a negative index material, can support both transverse electric and transverse magnetic guided modes with low losses. Recent developments in the de…
A computational study of ethane oxidative dehydrogenation to ethylene on Pt- and Pt/Sn-coated monoliths is presented as an improvement to previous kinetic models in reproducing experimental findings over a wide range of feed conditions. The multistep surface mechanism containing 20 reversible reactions among 11 surfac…
We have recently fabricated Keggin-type polyoxometalate (H 4 SiW 12 O 40 ) nanotubes by calcining layer-by-layer (LBL) structured ultrathin hybrid film coated electrospun fibrous mats. The hybrid film coated electrospun fibrous mats were obtained from the alternate deposition of positively charged poly(allylamine hydr…
Using a laser monitoring observation technique, the solubilities of 7-aminocephalosporanic acid (7-ACA) in binary acetone + water solvent mixtures were determined from 274.45 to 301.15 K, which are the important data for the operation of the crystallization process of 7-ACA from its aqueous solution. The experimental…
We report the unusually low swelling capacity of highly stretched polystyrene chains grown on a silicon surface using “living” free radical polymerization. The control over the lateral density leads to brushes with a very high grafting density (up to >1.0 chain/nm 2 ). Neutron reflectivity measurements have evidenced…
Wurtzite ZnS nanowires were produced by a vapour–liquid–solid process. The growth mechanism of the ZnS nanowires was studied by scanning electron microscopic observations at different stages of the nanowire growth. The produced nanowires were characterized by x-ray diffraction, scanning and transmission electron micro…