Synthesis and thermoelectric properties of oxygen deficient fluorite derivative Ga3−xIn5+xSn2O16
Exploring the possibility to obtain n-type oxide thermoelectrics, the transparent conducting oxide Ga3−xIn5+xSn2O16 (0.3
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Single-crystal neutron diffraction studies on Ni-based metal-pnictide superconductor BaNi2As2
We report the results of single-crystal neutron diffraction studies of the superconductor BaNi 2 As 2 . The experiments were performed on a tiny crystal of mass 0.8 mg at several temperatures between 20 and 200 K using the Single Crystal Diffractometer, SCD, at the Los Alamos Neutron Science Center. Above 130 K, BaNi…
Characterization of spruce thermomechanical pulps at the fiber cell wall level: a method for quantitatively assessing pulp fiber development using Simons’ stain
Fiber development of mechanical pulps is normally assessed by a combination of conventional numerical analyses of fiber features using FiberMaster, PulpEye, and Kajaani instruments. When observed, changes in fiber morphology are normally subjective with use of light- and electron microscopy observations of representat…
Chlorine speciation in nuclear graphite: consequences on temperature release and on leaching
Abstract This paper aims to get information on pristine chlorine speciation and its evolution with temperature in nuclear graphite used as a moderator in the first generation UNGG French reactors. For this purpose, temperature-programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS) have been carried out…
Synthesis of large diamond crystals containing high-nitrogen concentration at high pressure and high temperature using Ni-based solvent by temperature gradient method
This paper reprots that with Ni-based catalyst/solvent and with a dopant of NaN 3 , large green single crystal diamonds with perfect shape are successfully synthesized by temperature gradient method under high pressure and high temperature in a China-type cubic anvil high-pressure apparatus (SPD-6 × 1200), and the hig…
Nanoparticle-aggregated octahedral copper hierarchical nanostructures
A facile solution route has been developed to synthesize nanoparticle-aggregated octahedral copper hierarchical nanostructures. The formation of these novel octahedral copper hierarchical nanostructures can be attributed to a gas bubbles assisted aggregation mechanism. Based on the shape evolution and corresponding gr…
Plasma-electrolytic oxidation of titanium in Zr(SO4)2-containing electrolyte
It is shown that anodic oxide coatings with a thickness of several to 300 νm can be obtained on titanium by varying the charge spent on ( Q ). The prevailing phase in the coatings is ZrO 2 in monoclinic and tetragonal modifications. The content of zirconium in the layers is up to 20 at %. Distributions of titanium, zi…
Simple derivation of the formula for Sommerfeld supply density used in electron-emission physics and limitations on its use
In a free-electron model, an electron crossing a mathematical plane inside a conductor can be characterized by the energy components associated with its motion normal and parallel to the plane. These components define a two-dimensional “energy-space.” The “supply density” is defined as the electron current crossing th…
Effects of Sputtering Gas Pressure on Electrochromic Properties of Ni Oxyhydroxide Thin Films Prepared by Reactive Sputtering in H2O Atmosphere
Ni oxyhydroxide (NiOOH) thin films were prepared by reactive sputtering in an atmosphere of H2O gas, and the effects of sputtering gas pressure on their electrochromic properties in KOH aqueous electrolyte were studied. The largest optical density change was obtained for the thin films deposited under high sputtering…
Resonance structure of the rate of Auger recombination in silicon nanocrystals
The rate of Auger recombination in silicon nanocrystals is calculated in the context of the approximation of the envelope function. It is shown that the dependence of the rate on the crystallite radius is an essentially unsteadily varying function with characteristic variations within three or four orders of magnitude…
Evidence for a simple monatomic ideal glass former: The thermodynamic glass transition from a stable liquid phase
Under cooling, a liquid can undergo a transition to the glassy state either as a result of a continuous slowing down or by a first-order polyamorphous phase transition. The second scenario has so far always been observed in a metastable liquid domain below the melting point where crystalline nucleation interfered with…
Effect of compressive and tensile stresses in GaMnAs layers on their magnetic properties
The effect of elastic stresses (compressive, tensile) on the magnetic properties of epitaxial GaMnAs layers prepared by laser deposition of solid-state targets in a gas atmosphere on different buffer sublayers (In x Ga1 − x As and In x Ga1 − x P) and substrates (GaAs, InP) has been investigated. It has been establishe…
Effect of Added Metallic Elements in Ag Alloys on the Durability against Heat and Humidity of Indium Zinc Oxide/Ag Alloy/Indium Zinc Oxide Transparent Conductive Multilayer System
We studied the effects of added metallic elements in the Ag alloy layers of the indium zinc oxide (IZO)/Ag alloy/IZO transparent conductive multilayer system on the optical and electrical properties of the multilayer. The correlation between the thickness of the Ag alloy layers and the optical and electrical propertie…
The crystal structure of superconducting FeSe1−xTexby pulsed neutron diffraction
A transition to a superconducting state was recently observed in the binary alloy of FeSe 1-x Te x system where TC rises with increasing x. The substitution of the larger Te for Se ion results in no additional charges but increases the internal chemical pressure. Earlier studies suggested that the crystal structure ma…
Interaction between hydrophobic and superhydrophobic materials with aqueous media
Interactions between hydrophobic materials and aqueous media was studied using the analysis of specific surface resistance. Methods for measuring surface resistance are developed for both samples exposed in vapors and those in direct contact with liquid. As a result of the measurements performed, it is confirmed that…
Measuring diffusivity in supercooled liquid nanoscale films using inert gas permeation. II. Diffusion of Ar, Kr, Xe, and CH4 through Methanol
We present an experimental technique to measure the diffusivity of supercooled liquids at temperatures near their T(g). The approach uses the permeation of inert gases through supercooled liquid overlayers as a measure of the diffusivity of the supercooled liquid itself. The desorption spectra of the probe gas are use…
Material based characterization of aqueous metal oxide based supercapacitors
Supercapacitors (SC) / Electro Chemical Double Layer Capacitor (EDLC) is yet to experience widespread use. Recently, advances have been made in improving both energy and power density. Due to their limited power and energy capabilities, they saw use in applications such as memory backups. New applications in the area…
Thermoplastic elastomer blends based on waste rubber and low-density polyethylene
Materials based on waste rubber from discarded tires and low-density polyethylene (PE-LD) have been studied. The blends were prepared via compounding of molten PE-LD with ground rubber (average particle size 0.4 mm) in an internal mixer. The products behaved like thermoplastic elastomers. To improve mechanical propert…
Investigation of interdiffusion and kirkendall effect in the Co-Ni-Fe system: III. Dependence of diffusion parameters on the initial conditions
Dependences of the parameters of interdiffusion (effective coefficients, diffusion paths, Kirkendall shift) on the variation of the initial compositions of a diffusion couple have been studied on the concrete example of the Co-Fe-Ni system. The experimental results obtained show that the diffusion paths in the three-c…
Structural Evolution of Sputtered Indium Oxide Thin Films
Structural Evolution of Sputtered Indium Oxide Thin Films The indium oxide thin films were deposited at room temperature by reactive magnetron sputtering in the mixture of oxygen and argon on silicon and oxidized silicon substrates. The influence of the oxygen flow in the reactive mixture and post-deposition annealing…