Materials Literature
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The energy transfer mechanisms between Er3+ and Yb3+ ions have been investigated in LiLa9(SiO4)6O2 under selective Er3+ excitation. IR emission spectra, measured in the CW excitation regime, were used to establish a relationship between the macroscopic transfer and back transfer parameters. These measurements were com…
Polycrystalline NiZn ferrite doped with a small amount of Y 3+ ions and having the composition of Ni0.42Zn0.58YxFe2-xO4, where x = 0.00, 0.01, 0.02, 0.04, 0.06, 0.08 and 0.10, was analyzed. Specimens were prepared by the ceramic method. Thermo-magnetic analysis and evaluation of hysteresis loops parameters were chosen…
Plan and status of research and development (R&D) were described on coated fuel particle (CFP) and fuel compacts for the core of small-sized high-temperature gas-cooled reactor (HTGR) HTR50S at second step of phase I (second core of HTR50S). Specifications of existing CFPs for high burnup (HTR50S2-type-CFPs) were adop…
Graphene exhibits unusual electronic properties, caused by a linear band structure near the Dirac point. This band structure is determined by the stacking sequence in graphene multilayers. Here we present a novel method of microscopically controlling the band structure. This is achieved by epitaxy of graphene on 3C-Si…
Oxyhalogenides of bismuth BiOX (X=Cl, Br and I) are very interesting materials which nd various applications as X-ray luminescent screens, anti-Stokes (frequency upshift) converters, luminophors, and photoconducting analyzers of linear polarized radiation. Since each primitive cell consist of six monoatomic sites, the…
Because phonons are the main carriers for graphene heat transfer, modifying the dynamic properties of the crystal lattice by isotopes modulates the phonon behavior and alters the thermal properties. Here we demonstrate an artificially controlled texture synthesis of 12C-graphene/13C-graphene heterostructures via chemi…
The bonding structure of nitric oxide (NO) on Cu(110) is studied by means of scanning tunneling microscopy, reflection absorption infrared spectroscopy, and electron energy loss spectroscopy at 6-160 K. At low temperatures, the NO molecule adsorbs at the short bridge site via the N end in an upright configuration. At…
Abstract This paper presents an electrochemical sensing approach that enables quantitative detection of three major catecholamine hormones from a mixture by specifically employing a chemically-modified microelectrode array with α-, β- and γ-cyclodextrin (CD) ‘catchers’ holding unique physical matching (size and shape)…
The novel experimental setup for measurements of magnetostriction of thin films in the temperature range starting from 4.2 K up to the room temperature, using the strain modulated ferromagnetic resonance phenomenon, is presented. The sample under investigation is fixed at the anti-node of vibrations of the longitudina…
In this work yttrium oxide (Y2O3) nanocrystallites were synthetized by mean of sol-gel method using two different precursors. The raw materials were: yttrium nitrate, yttrium chloride and methanol as solvent. In order to promote the oxygen vacancies P123 poloxamer was incorporated. All as synthetized system were heat…
Cobalt-doped ferroferriborate ((Fe1-xCox)3BO5) nanorods (NRs) are synthesized by a one-pot high-temperature organic-solution-phase method. The aspect ratios of the NRs are tuned by the heating rate. These NRs form via anisotropic growth along twin boundaries of the multiply twinned nuclei. Magnetic properties are dram…
Abstract The catalytic performance of Co and Ni catalysts on AlZn mixed oxide supports depends on the synthesis procedure used for their preparation. For this study CoAlZn and NiAlZn catalysts were prepared by conventional sol-gel synthesis of the mixed oxide and subsequent impregnation of the support with the transit…
Paper presents the possibility of application of the Jiles-Atherton extended model to describe the magnetic characteristics of construction steel C45 under the inuence of tensile stresses. Experiment was performed on the frame-shaped samples. Then, the inuence of stresses on hysteresis loops was modelled with the Jile…
A new method for determining depth dependence of residual stress from measured magnetic Barkhausen signals is proposed. This method improves on the previously accepted practice, which rather loosely used Barkhausen measurements at different frequencies for nondestructively determining the depth dependence of propertie…
This study deals with measurement of harmonic distortion and Skewness of stator current in Clarke plane at crawling of induction motor. Three‐phase current signals have been transformed into Clarke plane. Dominancy of seventh harmonic is observed by assessing maxima and minima of stator current Concordia in Clarke pla…
To understand the effect of rare earth (RE) solute atoms on the mechanical properties of the Mg matrix, the elastic parameters and ideal shear strengths of Mg52RE2 (RE = Sc, Y, Gd–Tm, ∼3.7 at% RE) binary solid solutions were systematically investigated by first-principles calculations based on density function theory.…
A fluorinated poly-acrylate emulsion with various fluorine contents was prepared by a seeded semi-continuous emulsion polymerization method and applied to filter paper for oil-water separation applications. The effects of surface wetting behavior on the oil-water separation efficiency of the prepared filter paper were…
A three-dimensional phase field model is applied to study the morphology and growth kinetics of Ni4Ti3 precipitates, as well as the Ni concentration distribution feature, during the aging of a NiTi alloy. The model can reproduce well the multiple-variants morphology of Ni4Ti3 precipitates. The diameter-to-thickness ra…
With its extended tunability from the IR to hard X-rays and the exceptional spectral brightness offered by the 3rd generation storage rings, synchrotron radiation (SR) is an invaluable investigation tool. Major methodological developments are now available, and are applied to simple, isolated atoms and molecules (whic…
The role of doping Fe on the structural, magnetic, and dielectric properties of frustrated antiferromagnet YMn1−xFexO3 (x ≤ 0.5) has been investigated. The neutron diffraction analysis shows that the structure of these polycrystalline samples changes from hexagonal phase (space group P63cm) to orthorhombic phase (spac…