Materials Literature
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The dynamics of water around a biomolecular surface has attracted a lot of attention recently. We report here protein-solvent simulation studies of the small globular protein ubiquitin (human). The simulations are run unconstrained, without freezing the bonds. The mean square displacements of the water oxygen atoms sh…
Two highly substituted azulene derivatives were synthesised by Pd-mediated dimerisation from the corresponding tolan species. One azulene derivative (2) has donor functionalities (dianisylaminophenyl and dianisylamino) in the 1-, 2-, 3- and 6-positions, while the other (1) has donors (dianisylaminophenyl) in the 2- an…
Abstract In the previous two parts of this series of articles, the relations among the foaming conditions, microstructure, and impact properties of expanded microcellular polystyrene (EPS) were discussed. In this article, the effects of the foaming conditions and structure on the tensile properties of EPS were investi…
Abstract. The effects of three plant species, Calotropis procera , Zygophyllum gaetulum and Peganum harmala on survival, feeding behaviour and reproduction in the desert locust ( Schistocerca gregaria ) were studied under laboratory conditions. The species originate in Moroccan arid areas and were seen to be avoided b…
The preparation and structural characterization of the novel polyoxoanion [(alpha-1,2,3-P(2)W(15)Ti(3)O(62))(4)[mu(3)-Ti(OH)(3)](4)Cl](45-) (1 a; abbreviated to [TiO(6)](16); FW approximately 16 000) which consists of four tri-Ti(IV)-1,2,3-substituted alpha-Dawson substructures, four Ti(OH)(3) bridging groups, and one…
The room-temperature growth of Cu on the polar (0001)-Zn and (0001̄)-O surfaces of zinc oxide has been studied with scanning tunneling microscopy (STM). Copper grows on the (0001)-Zn surface as three-dimensional clusters even at low coverages (0.05−0.25 monolayers (ML)); two-dimensional (2D) islands are only observed…
A novel template guided enzymatic approach has been developed to synthesize optically active conducting polyaniline (PANI) nanocomposites in the presence of H2O2 as an oxidant, using (+) and (-) 10-camphorsulfonic acid (CSA) as a dopant and chiral inductor. The formation of chiral polyaniline in the nanocomposites was…
Atomically detailed simulations are used to compute the self-diffusivity and transport diffusivity of Ar and Ne through single walled carbon nanotube (SWNT) pores at room temperature. The diffusivities are computed over a range of loadings, corresponding to external equilibrium bulk pressures ranging from 0 to 100 bar…
The possibility of materials that are governed by a fixed point related to small world networks is discussed. In particular, large-scale Monte Carlo simulations are performed on Ising ferromagnetic models on two different small-world networks generated from a one-dimensional spin chain. One has the small-world bond st…
In this paper, we demonstrate external control over the magnetization direction in ferromagnetic (FM) In_{1-x}Mn_{x}As/GaSb heterostructures. FM ordering with T_C as high as 50 K is confirmed by SQUID magnetization, anomalous Hall effect (AHE), and magneto-optical Kerr effect (MOKE) measurements. Even though tensile s…
We consider in this review the statistical mechanical description of a very general microscopic lattice model of a compressible and interacting multi-component mixture of linear polymers of fixed lengths. The model contains several microscopic, i.e. bare parameters determining the thermodynamic state of the system. Ge…
Steady-state IR measurements for adsorption of only CO and under WGS reaction indicate that formates are present on the surface of partially reduced ceria, in contrast to a recent study, and that they are strongly limited at high CO conversions. At low temperatures and conversions, the formates are close to the equili…
Any polar-ordered material with a spatially uniform polarization field is internally frustrated: The symmetry-required local preference for polarization is to be nonuniform, i.e., to be locally bouquet-like or "splayed." However, it is impossible to achieve splay of a preferred sign everywhere in space unless appropri…
This paper reviews recent progress in the deposition of diamond and cubic boron nitride (cBN) films. It aims at the effort of preparing smooth surfaces, improving crystallinity and enhancing adhesion of diamond and cBN films. The properties of these materials, multi-stage growth processes and difference in synthesis o…
Crosslinked polyethylene (XLPE) insulated cables working in water are known to be easily degraded by forming water trees. This is one of the most serious concerns among users of XLPE cables. The possibility whether measurement of residual charge is usable as a tool to detect water trees in XLPE is discussed. Two types…
The design of XLPE cables, degradation factors to working XLPE cables, and exclusion methods of the degradation factors are reviewed. In addition, the soundness confirmation methods of extra high voltage XLPE cables are reviewed. As degradation factors of XLPE cables, electric stress degradation, partial discharge deg…
In high voltage applications, polymer insulation can be exposed to very high electrical field stress, resulting in long term exposure to corona. The electrical field stress may be much below dielectric breakdown threshold. Eventually the exposure to corona can lead to failure of the high voltage component. Nanometer s…
The authors propose a novel approach based on partial discharge (PD) current pulse waveform analysis (PD-CPWA) in order to assess insulation degradation of solid insulators with different kinds of defects. The CPWA technique focuses on the time transition of individual PD waveform parameters like rise time, fall time…
Gas Insulated transmission Line (GIL) is very well known for its high transmission rating of electrical power and its reliability. The high capacity of the transmission, the thermal, mechanical and the electrical behaviour of the new generation of the directly buried GIL were studied and tested by laying it in the gro…
Abstract New spin-crossover compounds, [Co(phimpy)2](ClO4)2 (1) and [Co(ipimpy)2](ClO4)2 (2) (phimpy = 2,6-bis(N-phenylformimidoyl)pyridine and ipimpy = 2,6-bis(isopropyliminomethyl)pyridine) were prepared, and the crystal structures were determined. The magnetic susceptibility measurements showed gradual transition f…