Materials Literature
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Subsolidus phase ratios of the Na2MoO4-CoMoO4-Sc2(MoO4)3 system have been studied by X-ray diffraction, differential thermal analysis, and vibrational spectroscopy. A phase of variable composition Na1 − x Co1 − x Sc1 + x (MoO4)3, 0 ≤ x ≤ 0.5 having NASICON structure (space group $$R\bar 3c$$ ) and triple molybdate NaC…
The effectiveness of the use of the synthesizable aluminosilicates in cement composites as the modifying additive, regulating the structurization and increasing the operational properties of cement systems is investigated. Nature of change of the index рН of a liquid phase of cement systems with the use of the synthes…
A new species of diatom, Orthoseira limnopolarensis, is described from a sediment core in Limnopolar Lake on Livingston Island, South Shetlands in the South Atlantic Ocean. The new species is distinctive in having an array of numerous (12–14) carinoportulae, a number of clearly defined rimoportulae which are described…
Current-voltage characteristics of ZnO nanostructures were studied under different gas ambient using nonequilibrium Green's function and density functional theory, DFT technique. It was found that I-V characteristics of ZnO nanostructures depend strongly on the type of gas molecules present. The sensitivity factor of…
We have doped manganese-oxide onto graphene by an electrochemical method. Graphene showed a clear ferromagnetic semiconductor behavior after doping of manganese-oxide. The manganese-oxide doped graphene has a coercive field (Hc) of 232 Oe at 10 K, and has the Curie temperature of 270 K from the temperature-dependent r…
Some problems of the thermodynamics of electrons in a doped graphene bilayer are considered. Analytical expressions are derived for chemical potential and specific heat in the limiting cases of low and high temperatures. The Seebeck and Thomson coefficients are estimated. Landau levels are studied using a semi-classic…
The need to measure the dynamic void fraction (the proportion of flowing bubbly liquid that is gas) is common across many power, processing and manufacturing industries. Many such pipelines and liquids are optically opaque, and work on margins that require a low cost solution that is not commensurate with the size of…
Theoretical investigation of the spatial confinement, self-polarization and exciton–phonon interaction influence on the exciton state in plane double nanoheterostructure (nanofilm)–lead iodide in polymeric matrix is performed within the effective mass approximation for the electron and dielectric continuum for the pho…
The relaxation character of the rheological behavior of hydroxypropyl cellulose and ethyl cellulose solutions in a magnetic field and without it was studied. Application of magnetic field leads to an increase in the viscosity of cellulose ether solutions. The mechanical and magnetic field energies stored by the soluti…
A self-consistent analysis of proton and deuterium nuclear spin relaxation times in the smectic phases of a partially deuterated smectogen is presented here. Proton spin-lattice relaxation times T(1Z) were measured as a function of Larmor frequency over a range of 1 kHz to 300 MHz at selected temperatures. Deuterium s…
In this study carnauba straw powder was submitted to chemical treatments using alkali (NaOH) or hexane, in order to increase its hydrophilicity and to investigate its potential use for the development of a biodegradable composite. Biocomposites were prepared in solution, using carnauba straw powder and chitosan as mat…
Water gas shift reaction (WGS) is normally performed in a two-stage process, a first stage at high temperature (HTS) conventionally carried out at 623 - 873 K on Fe/Cr-based catalyst, to take advantage from a fast reaction, and a second stage at low temperature (LTS) at 423 - 573 K on Cu/Zn-based catalysts, to reach a…
Bone loss associated with skeletal trauma or metabolic diseases often requires bone grafting. In such situations, a biomaterial is necessary for migrated cells to produce new tissue. In this study, agarose-chitosan was implanted in the femoral condyle of New Zealand White rabbits that were divided into three groups: G…
Fabrication of flexible temperature sensor array using reduced graphene oxide (rGO) by laser scribing is presented. This unique type of sensor employs graphene as sensing material in order to generate temperature distribution map of human skin, which is important for distinguishing some physiological changes. This dev…
Abstract Ultrathin sections of reference 2:1 layer silicates treated with octadecylammonium cations were examined using high-resolution transmission electron microscopy (HRTEM) to establish the layer structure. Hitherto, few HRTEM ultrathin-section data existed on the expansion behavior of smectite-group minerals with…
Results are presented of studying electrochemical properties of perovskite-like solid solutions (La 0.5 + x Sr 0.5 − x ) 1 − y Mn 0.5 Ti 0.5 O 3 − δ ( x = 0–0.25, y = 0–0.03) synthesized using the citrate technique and studied as oxide anodic materials for solid oxide fuel cells (SOFC). X-ray diffraction (XRD) analysi…
The design of an electrochemical reactor for the preparation of self-supported comparatively thin (up to 10 μm) and large area anodic alumina membranes is described allowing growth of porous alumina at high applied potential (up to 150 V) without burning.
Measurements are reported that suggest partial discharge sources might be detected and located using amplitude-only free-space radiometric measurements. The measurements are made in two locations with similar measurement protocols by three collaborating research groups. One measurement set is more encouraging than the…
Signal storage in magnonic quasicrystals using a slow spin-wave mode, rather than the quasinormal mode of traditional periodic magnonic crystals, is proposed, which is analogous to the slow light mode in the field of optics. Compared to traditional materials, richer and more wavelength-selective sharp resonances are a…
We investigated a method for preparation of ordered nanopore arrays with the interpore distance of 60 nm by guided self-organization of anodic aluminum oxide with a prepatterned array of pits in the starting Al film.