Materials Literature
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In recent years, a wide range of different methods to implant nanosized patterns on surfaces have been developed. Spin coating immiscible binary polymer blends is a straightforward method to prepare micro- and nanostructures on thin films. This study utilizes binary blends to effortlessly prepare stable, surface-funct…
Magnesium oxide (MgO) has been investigated as a possible candidate for gamma (γ) dosimetry. One thermoluminescence (TL) peak was observed in the red emission band around 372 °C in the pristine sample. The glow curves indicate that the main TL peaks appear at nearly the same temperatures after γ and ultraviolet irradi…
Abstract Recent advances in ion microprobe instrumentation and techniques have enabled the mapping of C isotope ratios across the whole of a polished plate of a natural diamond from Guaniamo, Venezuela. The resultant map of C isotope variation closely matches the cathodoluminescence image of the growth structure of th…
The ionic transport features were studied in PbCl 2 and SnCl 2 single crystals and in KPb 2 Cl 5 , K 2 PbCl 4 , PbCl 2 -Al 2 O 3 , CsSnCl 3 , and SnCl 2 - 6 mol % MCl (M = Li, Na, Ag, K, Tl, Rb, Cs) ceramic materials. A reference data review on electroconductivity of chloride-conducting solid electrolytes was made. A…
The method and results of studying the effect of relief depth on the attainable degree of reducing the spectral selectivity of two-layer diffraction structures based on plastics and glass. The possibilities of suppressing the spectral selectivity of double- and single-relief structures are compared.
Here, we report the progress in the chemistry of porphyrin-phthalocyanine and phthalocyanine-phthalocyanie multinuclear systems being developed by the organic chemistry groups of Cavaleiro and Torres.
Abstract The grain-boundary source and sink strengths for both vacancies and self-interstitials have been determined for columnar nanocrystalline structures of Mo using molecular-dynamics simulation. The microstructures, which are initialized to contain either an over-saturation or under-saturation of one particular p…
Changes in the electro-optical and dielectric properties of 4'-pentyl-4-cyanobiphenyl (5CB) due to electron beam irradiation up to 20 kGy dose have been studied. Dielectric spectroscopy for planar and homeotropic aligned samples has been carried out in the frequency range 100 Hz–35 MHz. Threshold and switching voltage…
Abstract Copper(II) triethylenetetramine [Cu(trien)] 2+ is an agent suitable for the 1-step determination of the cation exchange capacity (CEC) of many geomaterials using a procedure much less laborious than other, commonly used methods. It is also suitable for the determination of the composition of original exchange…
Ge 2 Sb 2 Te 5 is a promising candidate material for next-generation memory devices due to its fast phase-changing characteristics. The power consumption of an electronic device is a key factor in determining the working efficiency of next-generation memory devices. In this study, Si was doped on Ge 2 Sb 2 Te 5 thin f…
Abstract Objectives A liposome preparation that is amenable to receptor-mediated endocytosis has been developed to enhance the oral bioavailability of poorly absorbable peptidomi-metic drugs by use of folic acid as the mediator of liposomal uptake. Methods Folic acid was physically coupled to the surface of the liposo…
Abstract The chromate conversion coating formed on commercial tinplate via a cathode electrolytic dichromate treatment has been studied by X‐ray photoelectron spectroscopy (XPS) and electrochemistry methods. Through the analysis of the XPS, it was shown that there existed Cr, O, and Sn in the chromate coating and the…
The magnetic properties of the Bi1 − x Ln x FeO3 (Ln is a rare-earth ion), Bi1 − x A x FeO3 − x/2 (A is an alkali earth ion), and BiFe1 − x Ti x O3 + δ solid solutions in magnetic fields up to 14 T have been studied. The concentration ranges of the existence of the ferroelectric phase described by the space group R3c…
We present and discuss several methods to enhance the electrical properties of nanoparticle dispersion derived ITO-layers. A maximum conductance of 132 Ω−1 cm−1 was achieved and films with a sheet resistance down to 5 Ω/□ were produced. To demonstrate their applicability as electrodes in optoelectronic elements we ass…
The effect of cobalt doping on the thermopower of the superconductor FeSe is investigated through electrical and thermal transport measurements. Our results point to the destruction of superconductivity at very low Co concentrations. Thermopower data suggest negative charge carriers along with a large enhancement of t…
Sols of stabilized copper-doped CdSe nanocrystals in a nonpolar high-boiling solvent have been synthesized using cadmium oleate, copper stearate, and trioctylphosphine selenide as starting reagents. The average size of the nanocrystals is 2.8–2.9 nm, with a 10% variance, as evaluated from their absorption spectra. The…
Compact ceramic materials based on the Mn + 1AX n phases in the Ti-Cr-Al-C system are produced by forced self-propagating high-temperature synthesis (SHS) compaction. The mechanisms of the structure and phase formation in synthetic products, as well as the combustion macrokinetics of the SHS mixture, are studied. Comp…
The local structure of glasses and melts in the Na2O-B2O3 system in the composition range 10–30 mol % Na2O is investigated by high-temperature Raman spectroscopy in the temperature range 20–1150°C. The recorded spectra are analyzed by simulating the experimental spectra in the form of a superposition of the set of Gau…
Cheap and abundant natural products can be transformed into products of higher commercial value. One of the approaches for the functionalization of organic compounds is their oxidation in the presence of an oxygen atom donor, under the influence of a suitable catalyst. Metalloporphyrins, with structures based on the w…
Abstract The principles of recrystallisation texture formation upon hot rolling and annealing of industrial aluminium alloy sheets are presented. It is demonstrated how texture control is applied during industrial processing of aluminium sheet so as to improve texture-related properties. This is illustrated by way of…