Materials Literature
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Molecular dynamic simulations were carried out for carbosilane dendrimers of the 5th generation immersed in CCl4 solvent at different temperatures. The calculations were accomplished by using the AMBER force field in the united atom approximation. Lennard-Jones particles were considered as the solvent molecules with p…
thereby lowering insulation performance, so that these space charges must be suppressed at the design stage, in terms of the performance characteristics for XLPE insulation material under DC voltage. The following dielectric breakdown characteristics are inherent to DC voltage: • heat generated due to current in the i…
Aqueous peroxotungstates have been studied from pH 0.5 to 9.0, over a range of peroxide concentrations. Although equilibria are not always established, many anions can be identified by 17O NMR because the ratio of deltaO(W anion)/deltaO(known Mo anion) is consistently 79 +/- 3%. They are [WO3(HO2)]-; [WO(OH)(O2)2]-; […
A study has been conducted to examine the effect of a vigorous alkaline scour–bleaching preparation, followed by high temperature dyeing, reduction clearing and a reactive dyeing process on the physical strength of the Ingeo fibre component of an Ingeo fibre/cotton blend. The results indicate that the physical strengt…
The preparation of individual polyacetylene nanofibres has allowed a more probing investigation of the properties of polyacetylene. A significant discovery is that at low temperatures, polyacetylene nanofibres show temperature-independent Zener-type tunnelling, that we suggest is tunnelling of the conjugated-bond patt…
Abstract The flammability of eight halogen‐free styrene resins and one halogen‐containing styrene resin was characterized by UL 94 VB, LOI and cone calorimeter tests. Their burning behaviour was also measured when exposed to three external ignition sources (methenamine tablet, candle, paper ball). Five resins were use…
Abstract Summary: A library of 148 cathodic electrodeposition paints was synthesized and the properties of related amperometric glucose biosensors were evaluated. For this a novel automatic electrochemical robotic system was designed. The automatic biosensor fabrication and characterization sequence involves the elect…
Electrochemical current-potential and impedance measurement techniques have been applied to a ceramic anode based on the mixed electronic and oxide ion conductor Sc 0.15 Y 0.05 Zr 0.62 Ti 0.18 O 1.9 (ScYZT). Significantly better performance is obtained with this anode using a platinum current collector than for platin…
A hexagonal array of optically active ZnO nanoparticles was synthesized in situ on the solid substrate by utilizing a single-layered film of diblock copolymer micelles as a nanostructured template.
The growth and coarsening of liquid crystalline (LC) nuclei at isothermal conditions after a temperature quench across the isotropic to cholesteric phase transition was investigated experimentally and described with the model of reversible aggregation. The time resolved statistical size distributions of LC nuclei, obt…
The physical kinetics of single domain ferroelectric materials are studied employing Landau-Khalatnikov equation. The resulting hysteretic curves are obtained numerically. The effective coercive electric field is found to be theoretically dependent on the driving amplitude and frequency as observed in the experimental…
Lanthanide-doped sol-gel-derived materials are an attractive type of luminescent materials that can be processed at ambient temperatures. However, the solubility of the lanthanide complexes in the matrix is a problem and it is difficult to obtain a uniform distribution of the complexes. Fortunately, these problems can…
The performance of static adsorption of p toluidine onto the hypercrosslinked polymeric adsorbents NG 5 and NG 10 with sulfonic groups was investigated in details and some comparison was made between NG 5,NG 10 and the common adsorbent CHA 111.The results showed that the adsorption capacities of NG 5 were higher than…
To render impossible the penetration of interference (disturbing) energy of electromagnetic radiation to sensitive electronic devices, or to protect people against its effects, there is a need of shielding in many areas. The importance of this problem has resulted in a growing number of research works on the optimisat…
A virtual atom cluster (VAC) model that represents the effect of interatomic bonding is developed as the constitutive model for crystal systems. In contrast with the crystal elasticity model, the proposed VAC model is distinguished by the following features: i) It does not build any constitutive relations that involve…
Five representative lanthanide coordination compounds with a disulfoxide ligand [L = 1,4-bis(phenylsulfinyl)butane], [Ln(L)4](ClO4)3 (Ln = La, 1; Eu, 2; Gd, 3; Tb, 4; Yb, 5), have been synthesized and structurally characterized by single-crystal X-ray diffraction. These compounds have isostructural mononuclear structu…
Galvanostatic anodization of aluminum at high current densities (100, 150, 200 mA cm −2 ) was studied. The growth rates of the synthesized anodic aluminum films were 1-3 μm/min. Films with ordered pores or with a fractal surface were also prepared. Consequently, nonlinear anodization and hypothesis for film formation…
The condensation copolymerization of a variety of linker molecules with polyethylene glycols (PEGs) of varying molecular weights, catalyzed by lipases under solvent-less conditions is reported. Previously, we reported the lipase-catalyzed condensation polymerization of dimethyl 5-hydroxyisophthalate with polyethylene…
A mean of one biotinylated dextran molecule per particle is conjugated to 15 nm gold nanoparticles, by a process of self-assembly, which depends on the relationship between dextran molecular weight and particle size.
Abstract The reaction of HgCl 2 with PPh n Pr 2 , Te(Si n Bu 3 ) 2 and PhESiMe 3 (E = Se, Te) in DME at −30 °C results in the formation of yellow octahedral crystals of [Hg 10 Te 4 (SePh) 12 (PPh n Pr 2 ) 4 ] and [Hg 10 Te 4 (TePh) 12 (PPh n Pr 2 ) 4 ] respectively. The molecular structures of the clusters are similar…