Materials Literature
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Cu-catalyzed ZnO nanowires have been synthesized by thermal evaporation of Cu- Zn powder alloys in a water vapor atmosphere. The diameters of the nanowires can be controlled by the amount of water vapor introduced into in the reaction tube. Raman spectroscopic characterization reveals two additional modes at 621 and 6…
The phases and the magnetocaloric effect in the alloys R(Co1-xSnx)2 with x = 0, 0.025, 0.050, 0.075, and 0.100 were investigated by X-ray diffraction analysis and magnetization measurement. The substitution of Sn in RCo2 is limite. The cubic MgCu2-type structure for the alloys of RCo3 was confirmed by X-ray powder dif…
Nanocomposites of polyaniline (PAni) with CdS were prepared from the reaction of dimethyl cadmium (DMCd) and hydrogen sulphide with camphor sulphonic acid (CSA) and phosphoric acid (PA) acid doped polyanilines. PAni.CSA.CdS (PAni‐I) and PAni.PA.CdS (PAni‐II), the so‐named nanocomposites in their UV‐Visible absorption…
The feasibility was investigated to substitute chrome-free passivation treatment of electrodeposited zinc in a titanium bath for chromate passivation treatment. The formation mechanism of the chrome-free passivation film was further analyzed. The surface morphologies and the elemental compositions of the treated sampl…
Polycrystalline tetragonal zirconia fiber was obtained by pyrolysis of precursor fibers from citrate‐acetate‐zirconium complex solution. The viscous zirconia sol with good spinnability was prepared by aging the starting solution of ZrOCl2 · 8H2O (ZOC) in the presence of acetic acid (HA) and citric acid (CA). The effec…
A dynamic model for the Monte Carlo method is developed to analyze the atom recombination on a catalytic surface. A numerical method for the study of this model is considered. The concentrations of physically and chemically adsorbed atoms obtained using this approach are in good agreement with experimental data and wi…
A two-dimensional model of a granular medium is represented as a square lattice composed of elastically interacting round particles with translational and rotational degrees of freedom. In the long-wave approximation, we derive linear partial differential equations describing the propagation and interaction of waves o…
Electronic absorption and Raman spectra of solid and molten Cs 2 NaHoCl 6 elpasolite have been measured in the temperature range 20 - 780 ◦ C. The Raman spectra of the solid indicate that there is no phase transition above room temperature. It appears, that the internal vibrational modes of the solid are transferred i…
Deposition rates of Ag and Cu thin films with respect to sputtering parameters have been compared. Discharge current range of 200-1200 mA, gas pressure (Ar) with range of 0.02-0.2 mbar has been used. Dependency of rate, on current gas pressure and horizontal and also vertical distance has been studied. Deposition rate…
Fibrous structures have been designed and tested to achieve anisotropic flow properties. A structure that transports liquid in one specific in-plane direction as fast as possible was formed by parallel arrangement of continuous filament yarns in the middle layer of a three-layer structure. The top and bottom layers co…
Liquid loss occurs at the receding contact line that forms when a substrate is withdrawn from a liquid. This behavior, often called film pulling, is fundamental to coating and cleaning processes, as well as other systems. There has been substantial prior work relative to understanding the static and dynamic behavior o…
As the wiring-space decreases, the time-dependent dielectric breakdown (TDDB) of Cu/low-dielectric constant ( k ) interconnects becomes a critical reliability issue and more accurate prediction of the TDDB lifetime will be required. In this investigation, TDDB dependences on temperature and electric field are studied…
The damage evolution in a material during quasi-static and dynamic tests can be studied by interrupting the test at predetermined elongation values and post-mortem analyses of the specimens. While it is straightforward to interrupt quasi-static tests at a predetermined level of elongation, this interruption presents d…
Cu/Ti3AlC2 cermets prepared by pressless sintering a mixture of Ti3AlC2 and copper powders were investigated. It was found that the Cu/Ti3AlC2 possesses an unusual microstructure made up of sub-micro-sheet layered Ti3C2 and Cu-Al alloy within one Ti3AlC2 particulate. The fracture strength measured by the three-point-b…
The sizes of particles (ions and their associations) that participate in processes related to heat and mass transfer and electrotransport in condensed matter, as well as the interaction of the particles, are of importance. The effective radii of the Al 1+ and Al 2+ ions are calculated in accordance with models propose…
This article reports on investigation of the correlations between the process parameters, structure, and surface morphology of sputtered TiO2 films prepared by magnetron sputtering. It has been found that the increase in the partial pressure of oxygen results in (i) the decrease of TiO2 film deposition rate and (ii) s…
We study the nonlinear stress-strain constitutive relation proposed earlier for describing one-dimensional isothermal rheological processes in the case of monotonous variation of the strain (in particular, viscoplasticity, creep, relaxation, plasticity, and superplasticity). This relation contains integral time operat…
Carbon nanotube field effect transistors (CNTFET) are promising nano-scaled devices for implementing high performance, very dense and low power circuits. The core of a CNTFET is a carbon nanotube. Its conductance property is determined by the so-called chirality of the tube; chirality is difficult to control during ma…
The crystal-chemical characteristics of new complex sulfides SrLnCuS 3 (Ln = Gd, Lu) are determined from the data of X-ray powder diffraction patterns. SrGdCuS 3 crystallizes in the orthorhombic crystal system (space group Pnma ) and belongs to the Eu 2 CuS 3 structure type with the unit cell parameters a = 10.3282(8)…
GOAL: To review the importance of postoperative compression and compression garments to promote postoperative healing and improved aesthetic results. OBJECTIVES: --Understand the importance of proper postoperative compression and the selection of the proper compression garment. --Identify the important elements to loo…