Materials Literature
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We study the phase transition from amorphous to face-centered-cubic (fcc) polycrystalline Ge2Sb2Te5 thin films. The transformation has the peculiar characteristic, still not well understood, of coexisting high transition rates at low annealing temperature (with grain growth velocities of the order of 1nm∕min at 140°C)…
The microstructure and optical properties of MgO–TiO2 composite thin films prepared by radio frequency magnetron sputtering were studied. The composite films have an amorphous structure and the growth rate of the composite film increases with increasing Mg content. The refractive index almost linearly decreases with i…
The article discusses the investigation of the optical properties of newly synthesized CdTe nanocrystal quantum dots (NQDs) capped with oleic acid/trioctylphosphine surfactants and grown in the presence of in situ formed Cd 0 nanoparticles, precipitated prior to the formation of the CdTe NQDs. These CdTe NQDs exhibit…
Ultrathin ruthenium films are promising capping layers protecting extreme ultraviolet lithography optics against carbon growth and oxidation. The structure and reactivity of 2, 5, and 7 nm thick nanocrystalline Ru films on Si (serving as a model system for Ru capping layers) were studied by multiple techniques includi…
A novel pencil-beam, full-space scanning 2D composite right/left-handed (CRLH) transmission line (TL) leaky-wave antenna (LWA) array is proposed. The proposed array achieves the same performance of conventional phase array antennas in a simpler manner. Moreover, array elements are fed by a CRLH infinite-wavelength ser…
This letter presents the influence of ferromagnetic nanowires on permittivity and losses on a so-filled membrane. For this purpose a theoretical permittivity model has been developed by considering geometrical parameters of the substrate such as the porosity of the membrane and the height of the nanowires. It has been…
We show that a semi-infinite magnetoelectric (ME) material adjoining a vacuum sustains the propagation of a shear horizontal wave accompanied by electromagnetic waves. The ME material is assumed to possess hexagonal (6 mm) symmetry. The expression for the phase velocity of this wave is obtained explicitly. The result…
Deformation behavior of Zr-Nb alloys under uniaxial compression, accompanied by phase transformations, is considered by the example of Zr-1%Nb and Zr-2.5%Nb alloys. Model samples were deformed at temperatures of β- and (α+β)-regions of the phase diagram Zr-Nb. Mechanisms, responsible for plastic deformation of alloys…
The phase composition and structure of a mixture of aluminum and quartz powders taken in a ratio of 1:1 have been studied after loading by spherical converging shock waves. A number of concentric layers (zones) have been observed in a meridian section of the sample after shock-wave loading. The pressures in the conver…
With a view to improving the catalytic performance of supported bimetallic platinum-copper catalysts in hydrogen-assisted dechlorination of halogenated alkanes, a range of catalysts were prepared by reduction of oxide precursors by the hydride anion H − , using both sodium and calcium hydrides (NaH and CaH 2 ). The ca…
The majority of synthetic and regenerated cellulose fibers are crimped after spinning in order to possess natural appearance and texture, warmth and handle. Depending on the circumstances in processing, fibers may experience complex combinations of tensile, compression, flexural and torsional, deformation, abrasion, e…
This paper describes the results of dielectric studies of commercially available "Ceramawire" and "Fujithermo M" ceramic insulated wires have been conducted at selected temperatures in the range of 20 °C to 400°C. The current-voltage characteristics provide information on conduction mechanisms and changes in the magni…
A solid-state graft copolymerization for poly(ethylene terephthalate) (PET) films was proposed for a new surface modification technique. The functional groups included in graft monomers can be introduced on a PET surface. Allylbiguanide hydrochloric acid salt (ABG), N -methylol acrylamide (NM-AAm), and N -isopropyl ac…
Lake Prespa belongs to the group of ancient lakes. By subterranean channels it is connected with Lake Ohrid. In the past two decades, Lake Prespa has been characterized by a decrease of its water level and an increased cultural and natural eutrophication. In this period, very few ecological studies were performed, bas…
Possible effects of stress on the movement of grain boundaries and phase boundaries are considered in terms of available driving forces and mechanisms. Examples of some of these effects are presented from the literature and new experimental results. Stress may influence the kinetics of transformation and also the micr…
This paper presented the results of a study on the hydrophobicity loss of HTV silicone rubber under the different corona discharge conditions. The experimental results show that the speed and grade of hydrophobicity loss vary with the corona discharge time and the corona intensity. Moreover, it is noticed that the hyd…
It is shown that a large temperature difference between the emitting surface and the substrate exists in the case of field emission of electrons from nanosize carbon structures. This makes it possible to explain small values of the effective electron work function in the case of field emission from such structures.
Stress corrosion cracks in stainless steel core components from several different boiling-water reactors (BWRs) were characterized down to the nanometer scale using high-resolution analytical TEM. Cracks and crack tips were evaluated in samples from core shrouds and recirculation pipes having a wide range of irradiati…
Abstract A new process for converting sulfur dioxide to elemental sulfur by a cyclic process involving calcium sulfide and calcium sulfate without generating secondary pollutants, developed at the University of Utah, was described in Part I of this series. In this process, sulfur dioxide is reacted with calcium sulfid…
The thermolysis of the complexes [Co(NH 3 ) 6 ] 2 C 2 O 4 [Cu(C 2 O 4 ) 2 ] 2 (I) and [Co(NH 3 ) 6 ]Cl[Cu(C 7 H 4 O 3 ) 2 ] (II) in air and hydrogen at 200, 350, and 500°C and the composition and properties of the thermolysis products are considered. The oxidative thermolysis of the complexes yields mixtures of cobalt…