Materials Literature
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Gaskets made of acrylonitrile butadiene rubber (NBR) coating and metal plate were one of the classified seals used in automotive engine. In the present study, NBR foam–metal composite gaskets were prepared by liquid NBR overlain metal plate. The foam coating was thinner and more uniform compared with solid rubber form…
New organic DL-alanine maleate single crystals have been grown using slow evaporation solution growth technique. The solubility of grown material was determined using water as solvent. Single crystal X-ray diffraction reveals that the grown crystal crystallises in orthorhombic system with non-centrosymmetric space gro…
The electronic structure of the gold nanoparticles were investigated by semi-empirical Wolfsberg - Helmholz method. This is a variant of the molecular orbitals method. Molecular orbitals are represented as a linear combination of valence atomic orbitals of the atoms of the nanoparticle. As the atomic orbitals used 6s-…
Castings made of copper–nickel–aluminium bronze (CuAl10Fe5Ni5) alloys regularly show defects in the thick, slowly solidifying parts of the castings, which give rise to rejections. Metallographic examination has been made on material of scrap castings showing porosity accompanied with film-like inclusions located besid…
Plasma polymerization technique includes plasma (state) polymerization which is one of the most powerful methods for surface modification of polymeric materials. Plasma polymerized organic thin films have received a great deal of interest because of their unique characteristics such as: pinhole-free, structurally cros…
New data for parnauite from the type locality, Majuba Hill, Nevada, USA (MH; type specimen), and also from Cap Garonne, Var, France (CG), and the Clara Mine, Baden-Württemberg, Germany, are presented. The average chemical composition of MH material is (CuAlFe )(AsAlSi S)O(SO )(OH) · 7HO and that of CG parnauite, (CuAl…
The amount of twisted conformation of a porphyrin rotor, when confined within ionic liquid reverse micelles, increased as compared to the neat solvents within a set of 1-alkyl-3-methylimidazolium ionic liquids. A similar trend was noted within DMSO-containing reverse micelles, indicating that the confinement might be…
Polymer-dispersed liquid crystal (PDLC), with characteristics of high contrast and low driving voltage, has found many product applications and is an important material for new generations. In this experiment, we used 2-phenoxy ethyl acrylate (2-PEA) and tripropylene glycol diacrylate, two acrylic monomers, to prepare…
In this paper, we present a design technique to realize reconfigurable terahertz (THz) frequency selective surface (FSS) polarizer. Our approach relies on combining vanadium dioxide (VO2) patches with metallic resonators. Vanadium dioxide behaves as an insulator at room temperatures and as a metal at high temperatures…
CdTe nanoflake arrays were fabricated directly on a conductive substrate via gas-phase tellurization of a cadmium nanoflake template. A put-in-heating technique was developed to prevent the fusion and collapse of the cadmium template, as a result, the nanoflake morphology was well preserved during high temperature tel…
Abstract A large π‐conjugated chromophore composed of two dipyrido[3,2‐a:2′,3′‐c]phenazine units directly fused to the central tetrathiafulvalene core has been prepared as a bridging ligand and its strong binding ability to Ru2+ to form a new dinuclear complex is presented. The electronic absorption and luminescence s…
2D lamellar aluminophosphate (LAP) is successfully exfoliated into nanolayers in polyurethane (PU) through the combination of organically modification and solution casting method. Morphological studies by XRD and TEM show that the exfoliated LAP nanolayers are dispersed well in the PU matrix. The introduction of small…
The majority of the kinetic models employed in catalytic after-treatment of exhaust emissions use a global kinetic approach owing to the simplicity because one expression can account for all the steps in a reaction. The major drawback of this approach is the limited predictive capabilities of the models. The intrinsic…
This paper discusses the numerical exponential instability of the transfer matrix method (TMM) in the framework of the symmetry formalism. This numerical weakness is attributed to a series of increasingly extreme exponentials that appear in the TMM when it is applied to geometries involving total internal reflection (…
As a new nano-scale functional material, it is necessary to achieve a uniform distribution in the composites for gaining the CNFs’ excellent reinforcing effect. In this paper, CNFs were purified by the method of high temperature annealing treatment. Six surfactants, methylcellulose (MC), hydroxypropyl methylcellulose…
Highly-qualified graphene was prepared by the ultrasonic exfoliation of commercial expanded graphite (EG) under the promotion of (NH4)2CO3 decomposition. The yield of graphene from the first exfoliation is 7 wt%, and it can be increased to more than 65 wt% by repeated exfoliations. Atomic force microscopy, x-ray photo…
CuO nanograins (NGs) and CuO nanowires (NWs) on the top of nanograins samples were produced by the electrical resistive heating method. The NGs sample shows absence of long range magnetic order and strong field-induced ferromagnetic behavior. In the sample comprised of NWs on the top of NGs, a long-ranged antiferromag…
Luminescent properties of liquid-crystalline tris(β-diketonate) europium(III) complexes with Lewis bases (substituted 2,2′-bipyridine and 1,10-phenantroline) are investigated. Absolute and relative quantum yields and lifetimes are determined. Absorption, excitation, and emission spectra of the complexes are investigat…
The graphene paper fabricated through an electrochemical exfoliation and filtration process provides high quality and massive graphene sheets in an ink form synthesised using artificial graphite as starting material. The product is mainly composed of bilayer and few layer graphene. Their lateral size can be up to >10…
In this paper, strontium carbonate (SrCO 3 ) and barium carbonate (BaCO 3 ) crystals were synthesized in the presence of an organic additive-hexamethylenetetramine (HMT) using two CO 2 sources. Scanning electron microscopy and X-ray powder diffractometry were used to characterize the products. The results showed that…