Materials Literature
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This study presents the preparation of regenerated cellulose (RC)/graphene nanoplatelets (GNPs) nanocomposites via room temperature ionic liquid, 1-ethyl-3-methylimidazolium acetate (EMIMAc) using solution casting method. The thermal stability, gas permeability, water absorption and mechanical properties of the films…
The development of new promising heat-resistant materials capable of functioning at high temperatures under oxidation conditions is considered. The results of the development of a technology for producing high-temperature ceramic composites with a multilevel complex protection system are presented.
The reduction characteristics of <TEX>$NO_2$</TEX> to NO are experimentally studied over a platinum-based catalyst, especially at lower temperatures below about <TEX>$200^{\circ}C$</TEX>. In the present work, two types of steady-state experiments, engine bench and synthetic gas bench tests, are carried out in sequence…
We present the characteristics of the thermoluminescence (TL) response of Ge-doped optical fibers with various energies and exposures of photon irradiation. To investigate the Ge-doped SiO2 as an efficient TL material, the TL responses are compared with commercially available standard TLD100 media. The Ge-doped optica…
The luminescence and recombination processes in crystals of lithium borates Li6Gd x Y1 − x (BO3)3:Eu (LGYBO:Eu) have been studied. The photoluminescence (PL) spectra upon selective photoexcitation to lower excited states of Gd3+ and Eu3+ ions and the temperature dependences of the photoluminescence intensity at differ…
In this study, arsenic sulphide A s4 S 4 nanoparticles have been prepared, by high-energy wet milling, in the presence of sodium dodecylsulphate, which acts a surfactant. Solid state properties of the nanoparticles were characterised by XRD, Raman scattering, specific surface area and particle size distribution. Chang…
Indium tin oxide (ITO) nanoparticles are synthesized by the two-degradation sulfide and liquid-phase co-precipitation method under the given conditions with solutions of InCl 3 ·4H 2 O and SnCl 4 ·5H 2 O in the presence of ethylendyamine. The sample powders were characterized by x-ray diffraction (XRD) and scanning el…
The applicability of coordinate transformation methods are investigated for surface structures. It is shown that in-surface transformation implementations cannot perform the full range of applications achieved with volume media. Anisotropic impedance surfaces are used to split a surface wave beam and then recombine it…
Lower and upper bounds for the Laplacian energy-like (LEL) molecular structure descriptor are obtained, better than those previously known. These bonds are in terms of number of vertices and edges of the underlying molecular graph and of graph complexity (number of spanning trees)
In this work, we propose an analytical nonlinear model for laminate multiferroic composites in which the magnetic-field-induced strain in magnetostrictive phase is described by a standard square law taking the stress effect into account, whereas the ferroelectric phase retains a linear piezoelectric response. Furtherm…
This article presents a review of the works that are devoted to the formation of supramolecular anisotropic structures in a wide class of model solutions of homochiral compounds and biological fluids. Spontaneous formation of crystalline rigid strings takes place in the study solutions at low concentrations (10 −3 -10…
Neutron powder diffraction studies of crystal and magnetic structures, magnetization and magnetotransport measurements have been performed for La0.5−xPrxBa0.5CoO3−δ (x≤0.375, δ&lt;0.25) cobaltites. It has been found that the compositions (0≤x≤0.35) are cubic (Pm3m) whereas x=0.375 one is tetragonal (P4/mmm) due to…
The degradation of dichloroacetonitrile (DCAN) by means of the processes of sonolysis, ozonolysis and sonolytic ozonolysis was studied, and degradation rate constants were evaluated at various frequencies and power densities of ultrasound. The ultrasonic frequencies used were 35, 170, 283, 450, and 935 kHz. The power…
The problem of an epitaxial graphene formed on a thin metal film in an external magnetic field has been considered. It has been shown that the problem can be solved using the Green’s function method within the Kadanoff-Baym formalism. Analytical expressions for the transferred charge as a function of the magnetic fiel…
The retention of nanometric microstructures is a challenge in any presureless sintering process. Grain size influences mechanical properties and grain coarsening retards densification upon sintering, thus resulting in the poor overall product properties. Hence, it is important to select, among others a suitable sinter…
Two new tetrachlorocobaltate(II) salts, [BzTPP]2[CoCl4]·H2O (1) and [4NO2BzTPP]2[CoCl4]·H2O (2) ([BzTPP]+ = 1-benzyl- triphenylphosphonium; [4NO2BzTPP]+ = 1-(4′-nitrobenzyl)tri- phenylphosphonium), have been prepared and characterized by elemental analysis, IR, MS, single-crystal X-ray diffraction, and magnetic suscep…
One must control the size distribution of catalyst Fe nano-particles (NPs) very carefully if one is to have any chance of growing "super-aligned" carbon nanotube (CNT) forests which can be spun directly into yarns and pulled directly into long sheets. Control of the Fe Nps size is important during all phases, includin…
To develop new steels that exceed the ballistic resistance, strength and toughness of current naval ship steel plates, we designed optimally quenching–lamellarising–tempering treated low carbon 10Ni steel plates. These plates displayed exceptional properties in all aspects; when compared to the widely used HSLA-100 st…
In this paper, we demonstrated the encapsulation of Mn/Cu/Fe-doped and co-doped ZnS nanowires (NWs) and ZnO quantum dots (QDs) with a layer of mesoporous SiO2 shell for the purpose of integrating dual emission and ferromagnetism property into one common nanostructure at room temperature. Within the ZnS:Mn2+Cu2+Fe2+/Zn…
The study of the properties of the defects provides an effective way to control the physical properties of solids, such as conductivity. Using a thermodynamic model which correlates the activation Gibbs energy with the bulk elastic and expansivity data, we determine the activation volumes for the conduction processes…