Materials Literature
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The precision X-ray structural investigation of KH 2 PO 4 (KDP) crystal samples from different growth sectors of a single crystal containing chromium impurities is performed. It is demonstrated that the structure of the sample from the prismatic growth sector is more perfect than the structure of the sample from the p…
Abstract New novel 2D network bimetallic MnIIAgI coordination compounds {MnII(L)2[AgI(CN)2]2}n (L = 3-methylpyridine (1) or 4-methylpyridine (2)) were synthesized and characterized by using single-crystal X-ray analysis and magnetic measurements. MnII ion in both complexes has MnN6 coordination with octahedral geometr…
Preparation parameters of layer-by-layer self-assembled films consisting of functional SiO 2 layers and emitting CdTe quantum dots (QDs) layers were investigated. A surface-treated plate was successively dipped into three different solutions: surfactant (thioglycolic acid, TGA), colloidal QDs, and functional silicon a…
A new type of packing material, polystyrene resin modified by cetyltrimethyl-ammonium bromide (R-CTAB), was developed for separation of emulsified oil wastewater. The unique separation mechanism of the modified resin is due to the hydrogen bond formation between hydrocarbon molecules and the free hydrophilic part of t…
Ecological pressures on chromium have now forced the leather industry to look for possible alternatives. A vegetable- aluminum combination tannage has been studied, with special attention being given to intended final product. Aluminum is mineral tanning agents that are widely used to stabilize collagens in the leathe…
The oxygen species and their reactivity in the mechanochemically prepared substituted perovskites La1 − x Sr x CoO3 − y were studied using temperature-programmed reduction (TPR) of the samples with hydrogen. The experimental data were compared with data on the catalytic activity of the series of La1 − x Sr x CoO3 − y…
The relaxation-time distribution function, its main parameters, and energy distribution of the density of states of charged defects have been calculated for the first time on the basis of the experimental isothermal relaxation curves for dark current in thin films of glassy Ge 0.285 Pb 0.15 S 0.565 semiconductors. The…
Polycrystalline films of betaine phosphite are grown on single-crystal quartz and lithium niobate substrates atop interdigitated transducers. It is revealed using a light-polarizing microscope in the reflection mode that the films are made up of large (up to 1 mm in size) single-crystal blocks. The temperature depende…
Full density Nb 2 O 5 -BaO-Na 2 O-SiO 2 Glass-ceramics, which could be used as the dielectric energy-storage materials to fabricate high energy density devices, were prepared by means of rapid quenching and succeeding annealing under different temperature. DTA and X-ray diffraction analysis showed that NaBa 2 Nb 5 O 1…
The current situation in the fluoropolymer chemistry and industry in Russia was overviewed, including the fluoropolymer manufacture and market related issues. Also, the research and manufacturing cooperation in the framework of the “Fluoropolymer Materials and Nanotechnology” joint venture was discussed.
The multiple scattering of 320 keV γ photons from targets of different atomic numbers and of various thicknesses is studied here experimentally. We observe that with increasing the target thickness, the number of multiply scattered photons increases, and saturates for a particular thickness of the target, known as the…
Abstract L-cysteine (Cys) was adsorbed by bentonite (Ben) from aqueous solutions of variable concentrations and pHs. The raw materials and the adsorbed molecules (Ben-Cys) were characterized using X-ray diffraction (XRD), infrared spectroscopy (IR), thermal analysis methods (TG, DTG and DSC). The results indicated tha…
This paper presents an aggregate model of multiple induction motors using a single equivalent circuit model, which simplifies the computation while simulating dynamic behavior of large power systems. The simulations and analysis are carried out using MATLAB-based software package. The performance of the aggregation mo…
The occurrence of multiple metal-resistance was assessed in two bacterial collections, named Herbicide Resistant Bacteria (HRB) and Nuclease-Producing Bacteria (NPB) respectively, consisting of 15 and 11 isolates obtained from a loamy sand cultivated with transgenic white poplars ( Populus alba L., cv ‘Vilafranca’) en…
The effects of rare earth oxides on dielectric properties of BaTiO 3 have been investigated. The addition of R 2 O 3 (R: Dy, Ho, Yb) significantly decreased the capacitance change with time under a DC electric field. Yb-doped specimens exhibited the lowest aging rate in the second stage, which is due to the larger pop…
A free-energy function for binary polycrystalline solid solutions is developed based on pairwise nearest-neighbor interactions. The model permits intergranular regions to exhibit unique energetics and compositions from grain interiors, under the assumption of random site occupation in each region. For a given composit…
The high-frequency and time-dependent behavior of carbon-nanotube (CN) transistors is examined by numerically solving the time-dependent Boltzmann transport equation self-consistently with the Poisson equation. The two-port admittance matrix, containing the transistor'sy-parameters, is extracted. At frequencies below…
A theoretical model is presented of the visible, near-infrared, and near-ultraviolet transmittance spectra of arbitrarily-shaped small-sized insulator particles embedded in an insulator in relation to the particle dimensions and the radiation frequency. The model is based on a number of assumptions. In the band gap of…
Low-reversible charging processes are studied on highly dispersed carbon electrodes used in double-layer capacitors and having high specific surface area (higher than 1000 m 2 /g). Restrictions on power and cyclability of such capacitors are due to the occurrence of irreversible and low-reversible electrode recharging…
Abstract Two novel transition‐metal complex templated borates containing crystalline water, Co(en) 3 [B 4 O 5 (OH) 4 ]Cl·3H 2 O ( 1 ) and [Ni(en) 3 ][B 5 O 6 (OH) 4 ] 2 ·2H 2 O ( 2 ), have been synthesized hydrothermally and characterized by elemental analysis, single crystal X‐ray diffraction, FT‐IR spectroscopy, and…