Materials Literature
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Binary phase diagrams of small particle systems, which consist of a liquid phase with pure solid phases, have been evaluated from the information on the Gibbs energy in the bulk and the surface tension of the liquid phase. As the size of the particle decreases, the melting point of the pure component decreases and the…
The pore size distributions of six mesoporous silica materials were determined by measuring the 1H NMR signal from the non-frozen fraction of confined acetonitrile as a function of temperature. The average pore size distributions determined by NMR agree fairly well with those obtained by N2 sorption measurements. Howe…
In order to obtain more information on the precipitation of nitrides, especially cubic type nitride CrN in weld heat affected zones of duplex stainless steels, the microstructures of thermally simulated weld heat affected zones (HAZs) of a commercial duplex stainless steel were characterized. The precipitates in the s…
Tumor metastases are extremely rare in striated muscles. Lately, we have found that muscle cell conditioned medium (MCM) inhibits the proliferation of various tumor cells while maintaining the growth of normal murine bone marrow cells. This dual activity was confirmed in vivo when the MCM was administered orally, i.e.…
A reaction between Gd(NO3)3·6H2O, K3[Cr(CN)6] and dmf or bpy has allowed the synthesis of two new ferrimagnetic GdIII–CrIII chains which are the first low-dimensional 4f–CrIII systems; magnetic susceptibilty data indicate antiferromagnetic coupling between GdIII and CrIII.
Epitaxial ferroelectric films undergoing a cubic-tetragonal phase transformation relax internal stresses due to the structural phase transformation and the difference in the thermal expansion coefficients of the film and the substrate by forming polydomain structures. The most commonly observed polydomain structure is…
Axial coordination to metalloporphyrins is an important tool in the supramolecular chemistry of these entities. Metalated 5,10,15,20-tetraphenylporphyrins can be axially linked to each other with the aid of amine and diamine ligands. Seven new crystalline materials consisting of such heterogeneous coordination oligome…
Tissue engineered biomaterial constructs are needed for plastic and reconstructive applications. To successfully form a space-filling tissue, the construct should induce a minimal inflammatory response, create minimal or no fibrotic capsule, and establish a vascular bed within the first few days after implantation to…
The dielectric behaviour of polluted porcelain insulators is investigated by means of experimental tests and simulation methods. The elaboration of the experimental results, using well known mathematical models of polluted insulators, leads to the identification of the arc constants. It was found out that the arc cons…
Based on reports that tuberculosis is on the increase, this investigation into the physicochemical properties of rifampicin when recrystallized from various solvent systems was undertaken. Rifampicin is an essential component of the currently recommended regimen for treating tuberculosis, although relatively little is…
The ability to determine the calcium carbonate polymorphic ratio of calcite, aragonite and vaterite in a mixture is important for a variety of applications, particularly the fields of biomineralisation and crystal engineering. Raman spectroscopy and powder X-ray diffraction were used to quantitatively determine the po…
One-dimensional infinite iodoplumbates with new structural types have been prepared by crystallization from solutions containing PbI2 and NaI with large counter ions. Whereas [(PhCH2)4P]2[Pb3I8] 1 contains PbII with octahedral and square pyramidal coordination, in [Me3N(CH2)6NMe3][PbI3]22, [Na(dmf)3]4[Pb6I16] 3, [Na4(…
We investigated electrochemical performance of natural graphite surface-treated with aluminum compared to that of untreated graphite. Aluminum triethoxide was used as the treatment source. In the treatment process, the drying temperature has critical influence on electrochemical performance of the treated samples. The…
An investigation on the structure of poly(o-phenylenediamine) (PPD) films, obtained by electropolymerization of oPD (1,2-diaminobenzene) on platinum at different pH values, was performed by X-ray Photoelectron Spectroscopy (XPS). XPS could be used as a “bulk” technique for PPD films analysis, due to their extremely lo…
We report on the temperature dependence of electrical resistivity, Seebeck coefficient and Hall coefficient of the Fe2VAl1−ySiy alloys with Si compositions y=0−0.20. While the Heusler-type Fe2VAl (y=0) exhibits a semiconductor-like resistivity behavior, a slight substitution of Si for Al causes a sharp decrease in the…
This article discusses the requirements for designing single component molecular metals, derived from the results of crystal structure analyses, electrical resistivity measurements and extended Hückel tight-binding band calculations, performed on molecular conductors composed of single-component molecules of [Ni(ptdt)…
Optimisation conditions for obtaining maximum cavitation intensity in ultrasonic baths are proposed using a simple and fast method. Parameters such as water volume, temperature, detergent concentration, horizontal and vertical positions, number of tubes in the bath, sonication time and bath water substitution were stu…
A method based on surface-enhanced Raman scattering (SERS) spectroscopy was developed to meet the need for the reliable and rapid identification of illicit drugs such as the 'designer drug' XTC, preferably to increase the security of legal certificates. A matrix stabilized silver halide dispersion on a microtiter plat…
We have developed a novel nanocomposite material, PEDOT/V2O5 by inserting poly(3,4-ethylene dioxythiophene) PEDOT in V2O5 layers using oxidative polymerization/intercalation in air. A systematic study of the synthesis of the nanocomposites by direct in situ reaction of 3,4-ethylene dioxythiophene (EDOT) with V2O5 fine…
Invar (Fe65Ni35), a ‘zero’ thermal expansion alloy consisting of Fe and Ni, has been successfully introduced into carbon nanotubes by pyrolysing, at 800 °C, aerosols of NiCp2/FeCp2 mixtures dissolved in C6H6; scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) studies reveal…