Materials Literature
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The contribution addresses the bridge between high temperature chemistry at which thermodynamic defect equilibrium with neighbouring phases can be assumed, and low temperature physics in which usually only electronic carriers behave reversibly. An optimised quenching procedure is discussed to obtain profile-free repro…
In this paper, we report on the oxidation kinetics in air of the ternary compounds (actual Nb:Al:C atomic ratios 1.95:1.05:0.95) and (actual Ti:Nb:Al:C ratios 0.94:1.06:0.93:0.94). In the 650-800°C temperature range, the oxidation reaction for the former occurs in two steps. First is At longer times and higher tempera…
A microwave-assisted reaction between Mo(CO)6 and Se has yielded MoSe2 nanoparticles. Nanorods of MoSe2 of lengths ranging from 45 to 55 nanometers are identified in the product mixture. The prepared MoSe2 has been characterized by X-ray powder diffraction measurements, FTIR spectroscopy, photoacoustic spectroscopy (P…
The lithium intercalation into a V 2 O 5 substrate was studied by chronopotentiometry. The samples were prepared by atomic layer chemical vapor deposition which provides homogenous and coherent layers at the surface of titanium plates. During the chargedischarge process, various phase transitions occurred in the syste…
Particle oriented bismuth titanate ceramics with high density was successfully developed by a novel processing involving a high magnetic field. The b axes of fine powder particles were oriented perpendicular to the applied magnetic field in the green compact. High density was achieved by subsequent sintering. The micr…
The density and molar heat capacity at constant pressure of silicon have been determined with use of molecular dynamics (MD) simulation. The interaction between silicon atoms was expressed by the Sttilinger-Weber potential and MD calculation was conducted on crystalline, liquid and amorphous states of silicon at tempe…
A novel hydroperoxo-copper(II) complex with a square-planar geometry has been prepared, which has exhibited a higher selectivity and catalytic reactivity for dimethyl sulfide, in contrast to that with a trigonal-bipyramidal one.
Electrochemical Copper Deposition in Etched Ion Track Membranes : Experimental Results and a Qualitative Kinetic Model , Schuchert, I. U., Molares, M. E. Toimil, Dobrev, D., Vetter, J., Neumann, R., Martin, M.
The dynamic grain refinement behavior upon severe plastic deformation has been systematically studied in commercial purity copper that was heavily cold rolled to large deformations at cryogenic temperatures. The low-temperature rolling allows the accumulation of extraordinarily high densities of dislocations in Cu, en…
A new class of porous nanocomposite materials have been prepared by reaction of alkoxysilanes with alkylammonium-exchanged phyllosilicates (clay minerals), using a sol-gel procedure which produces the complete delamination of these layered solids.
A new approach for the electrosynthesis of saccharide-imprinted poly(aniline boronic acid) is described. The method involves the formation of a saccharide-aminophenylboronic acid complex in the presence of fluoride to allow the electropolymerization of a self-doped, molecularly imprinted polyaniline. The formation of…
The softening behavior of ferritic-austenitic duplex stainless steels (DSS) was investigated separately for both phases by means of microstructure investigations and texture analysis. The results were compared to those of similar single phase materials in order to unveil the influence of the second phase on the specif…
A supercapacitor electrode was synthesized by cyclic voltammetric plating of onto a porous and highly conductive, Sb (6 mol %)-doped particulate substrate that possessed a large surface area A specific capacitance of 930 F/g for the component in 1 M and an overall specific energy of at a specific were achieved by an o…
The crystals of Na 2 Ti 3 O 7 were obtained by crystallization from flux. The structure of the compound was refined from X-ray diffraction data collected on a four-circle diffractometer (2θ/θ scanning technique, λMo K α radiation, graphite monochromator, θ max = 40°). The crystals are monoclinic a = 9.133(2) Å, b = 3.…
The effective diffusivity of in porous media was measured at high temperatures (650-800°C) using an electrochemical concentration cell. Porous membranes having total porosity between 29 and 48 vol% were fabricated from Sr-doped (LSM) with 20 to 30 wt% carbon added as a pore former. The effective binary diffusivity, at…
A new series of linearly extended tetrathiafulvalene analogues with thienothiophene and dithienothiophene π-conjugating spacers has been synthesized. Electronic absorption spectra present a vibronic fine structure typical for rigid conjugated systems. Investigation of the electrochemical behaviour of the new donors by…
The mechanism of NOx storage on Pt–Ba/Al2O3 and, for comparison, on Ba/Al2O3 catalysts was investigated. In situ FT-IR spectroscopy was used to follow temporal changes in the types and relative amounts of surface species formed at three different temperatures (423, 523, 623 K) during the reaction with NO, NO/O2, NO2 o…
Carbon and alumina are important components in refractories used in the steel industry. High temperature interactions of the refractory materials with liquid metal are crucial in dictating the chemical reactions occurring at the interface, this will control the life of refractory and also the metal quality. Although,…
Two phases produced through the liquid-liquid separation gravitationally segregate during solidification of the monotectic alloys. This paper examined reduction of the gravity segregation for the Cu-Pb monotectic alloys by imposing a static magnetic field up to 10 T. The Cu-Pb alloys with compositions ranging from 15.…
Complete cleavage of double stranded pUC19 DNA by the complex [Cu(dpq)2(H2O)](ClO4)2 (dpq, dipyridoquinoxaline) has been observed on irradiation at 694 nm from a pulsed ruby laser, assisted by the metal d-band transition as well as the quinoxaline triplet states in the absence of any external additives.