Materials Literature
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We show that rhombohedral graphite may support surface superconductivity with an unusual relation between the BCS coupling constant and the order parameter. This feature results from the properties of the states localized on the graphite surfaces. In a description including only the nearest neighbour coupling of the g…
Abstract Different flame retardant ethylene-vinyl acetate copolymer (EVA) formulations were prepared to evaluate the synergistic effect between organo-montmorillonite (OMMT) and a Schiff-base polyphosphate ester (PAB) on the combustion behavior of EVA. X-ray diffraction (XRD) and transmission electron microscopy (TEM)…
The effect of thermal treatment on surface wettability of polysiloxane coatings was fully studied. In contrary to the enhanced hydrophobicity of methyltrimethoxysilane (MTMS)-based coatings, the water contact angle of tetraethoxysilane (TEOS)-based coatings decreased from 70.8 to 52.8° when temperature increased from…
Concentrated emulsions (dispersed phase fractions greater than 1 vol %) have applications in a wide variety of industries. In the energy industry, these emulsions are encountered in every stage of crude oil processing. Characterizing such concentrated emulsions in the presence of surfactants and/or solid particles and…
We have performed muon spin rotation/relaxation and 119Sn nuclear magnetic resonance (NMR) measurements to study the vortex state of polycrystalline samples of YPd2Sn (Tc 5.4 K), over a wide range of applied magnetic fields up to Bc2(T). Measurements in the vortex state provide the temperature dependence of the effect…
The adsorption of CO2 on CuO(110) was investigated using density functional theory calculations. The CO2 molecule adsorbs on top of an unsaturated Cu atom with a titled configuration. The low adsorption energy and minimal charge transfer confirm the physisorption character of the adsorption process. Unlike pure copper…
The objective of the study was to investigate the solubilization of poorly water-soluble drug Lamotrigine in pure & mixed Pluronic polymeric micelles. Method: Two different Pluronic (Pluronic F68, Pluronic L81) were chosen and micelle formulations were prepared by using various drug:polymer ratios and model drug Lamot…
In order to clarify the reason why the hydrogen desorption temperature ( T d ) of MgH 2 is lowered by milling, we have studied the change in a local nuclear magnetic field with temperature by means of μ + SR. We have found a very clear oscillation in the ZF-spectrum at 2 K for the "milled" and "milled with Nb 2 O 5 "…
This study aims to present the design of a new soldering iron for welding electronic components that work via AC magnetic fields. Moreover, the device has been designed to operate in cordless mode. The system comprises of a resonant inverter that is capable of generating an alternating magnetic field of 250 kHz in the…
An auxiliary system in the form of thin vanadium layers on polymer film substrates has been used in surface density determinations. We have calculated correction coefficients that take into account the absorption of the primary radiation of an X-ray tube and that of analytical lines of the elements present in the subs…
We report synchrotron radiation diffraction and muon spin rotation ( μ SR) measurements on the frustrated pyrochlore magnet Tb 2 Ti 2 O 7 . The powder diffraction study of a crushed crystal fragment does not reveal any structural change down to 4 K. The μ SR measurements performed at 20 mK on a mosaic of single crysta…
Abstract Three new iron(II) spin‐crossover complexes with N2O2‐coordinating Schiff base like equatorial ligands and alkylimidazole ligands in the axial positions were synthesised. The chain length of the alkylimidazole was varied from the previously published 1 to 5, 7 and 10 carbon atoms to investigate the influence…
In this paper, a generic enhanced protection current transformer (CT) model with saturation effects and transient behavior is presented. The model is used for the purpose of analysis and design of power system protection algorithms. Three major classes of protection CT have been modeled which all take into account the…
A novel type of bi-compartmental copolymer particle was synthesized in one-pot by controlling the phase separation during the polymerization process. The resulting particles have two distinct compartments, one consisting of mainly poly(acrylic acid) (PAA) and the other of poly(N,N'-isopropylacrylamide) (PNIPAM). The p…
Zero (ZF) and longitudinal field (LF) muon spin relaxation data of the d-metal alloy Ni 1- x V x are presented at several vanadium concentrations x below and above the critical x c ≈ 11 % where long-range ferromagnetic (FM) order is suppressed. The clear single precession frequency observed for Ni, as expected for a h…
Molecular beam epitaxy growth of ferromagnetic Co 2 TiSi films on GasAs(0 0 1) substrates is presented and it is found that the optimum growth temperature is between 300–360 °C where the film is single phase and exhibits highly (0 0 1)-ordered crystal structure. The Co 2 TiSi films are ferromagnetic up to 300 K and th…
Abstract The complex [Zn2(tbb)Cl4]·4DMF [tbb = meso‐1,2,3,4‐tetra(1H–benzo‐[d]imidazol‐2‐yl)butane] was synthesized and characterized by X‐ray single crystal structure analyses [C44H54N12Cl4O4Zn2, Mr = 1087.53, crystal system, monoclinic, space group, P21/n, a = 9.2307(12), b = 11.3748(14), c = 23.874(3) Å, β = 90.480…
Abstract A series of mixtures of acrylic copolymer aqueous dispersions or acrylic copolymers and polyurethane water dispersions were used as environmentally friendly base coatings and an acrylic self-crosslinkable copolymer dispersion containing epoxy resin as top coating for natural leather. Samples finished with the…
The graphoepitaxial assembly of cylinder-forming block copolymers assembled into holes is investigated through theoretically informed coarse grained Monte Carlo simulations (TICG MC). The aim is to identify conditions leading to assembly of cylinders that span the entire thickness of the holes, thereby enabling applic…
We present high-transverse field measurements, as a function of temperature, in monoclinic ZrO2 and HfO2. In monoclinic zirconia and hafnia, a diamagnetic component had been previously reported in low-transverse-fields, but a significant fraction of the total muon polarization was missing in these experiments. We now…