Showing papers in "Superlattices and Microstructures in 2012"

TL;DR: In this article, the synthesis of magnetite (Fe 3 O 4 ) nanoparticles by a sol-gel method was described by using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive analysis by X-rays (EDAX), transmission electron microscope (TEM), superconducting quantum interference device (SQUID), and Mossbauer spectrometry.

TL;DR: In this article, the effects of two main types of structural defects, i.e. Stone-Wales and single vacancy, on the mechanical properties of single-layered graphene sheets (SLGSs) are investigated.

TL;DR: In this paper, two different chemical solution methods were used to synthesize Zinc oxide nanostructures via a simple and fast microwave assisted method, and the photocatalytic performances of the produced ZnO powders were investigated using methylene blue (MB) photodegradation with UV lamp irradiation.

TL;DR: In this article, pure and tin doped zinc oxide (Sn:ZnO) thin films were prepared for the first time by NSP technique using aqueous solutions of zinc acetate dehydrate, tin (IV) chloride fendahydrate and methanol.

TL;DR: Low temperature microwave hydrothermal method is developed to synthesize MgO nanowires and antibacterial agents and this novel method serve a direct route for mass production of Mg O nanowire and antib bacterial agents.

TL;DR: In this paper, a parametric study was conducted and the effects of pertinent parameters such as Rayleigh number, size of the adiabatic square body, and volume fraction of the Cu nanoparticles on the fluid flow and thermal fields and heat transfer inside the cavity were investigated.

TL;DR: In this paper, the authors investigated the heat transfer characteristics of a miniature heat sink cooled by SiO 2 -water nanofluids both experimentally and numerically by solving conjugate heat transfer problem of thermally and hydrodynamically developing fluid flow.

TL;DR: In this article, the effects of substrate temperature and annealing temperature on the structural, electrical and optical properties of transparent conducting indium doped zinc oxide (ZnO) was examined.

TL;DR: In this paper, the effects of variations of Richardson number, phase deviation of sinusoidal heating, and volume fraction of nanoparticles on flow and temperature field were investigated numerically.

TL;DR: In this paper, pure and Cobalt doped zinc oxide were deposited on glass substrate by Ultrasonic spray method and the effects of substrate temperature and presence of Co as doping element on the structural, electrical and optical properties were examined.

TL;DR: In this paper, a well crystalline undoped and Cd-doped ZnO rosette-like structures were successfully synthesized at low temperature (80°C) via solution process technique during 30min.

TL;DR: In this paper, the influence of the dopant elements and concentration on the microstructural and electrochemical properties of ZnO thin films deposited by spray pyrolysis was studied.

TL;DR: In this paper, the effects of co-doping of F and In on structural and optical properties of ZnO thin films were investigated and it was shown that the films have polycrystalline nature and the (0, 0, 2) preferred orientation is the stronger peak.

TL;DR: In this paper, the effect of longitudinal optical phonon field on the ground state and low lying-excited state energies of a hydrogenic impurity in a Zn 1− x Cd x Se/ZnSe strained quantum dot is investigated for various Cd content using the Aldrich-Bajaj effective potential.

TL;DR: The morphology and structure of the as prepared and annealed nanoporous silica films were studied using X-ray diffraction, scanning electron microscope, Fourier transform infrared spectroscopy and nitrogen absorption/desorption technique as discussed by the authors.

TL;DR: In this paper, the influence of silver on the performance of carbon nanotubes (CNTs) was investigated by employing Fourier-transform infrared spectra (FTIR), Raman spectroscopy (RAS), thermal gravimetric analysis (TGA), zeta potential measurement, scanning electron microscope (SEM), electron dispersive X-ray spectrometer (EDX), transmission electron microscopy (TEM), and reflectance spectrography (RS).

TL;DR: In this article, the structural stability, elastic, lattice dynamic and thermodynamic properties of the ordered SiGe, SiSn and GeSn cubic alloy in zinc-blende (B3) structure were investigated.

TL;DR: In this paper, the authors used spray pyrolysis to construct fluorine doped zinc oxide (FZO) films from fresh and aged (4, 8, 12 and 16) starting solutions.

TL;DR: In this paper, a novel zinc oxide (ZnO) flake-based humidity sensor was fabricated and characterized, and it was found that fast response sensor can be achieved by substituting conventional sputter ZnO thin films with nano-flakes.

TL;DR: In this paper, the effects of type of the nanoparticles, particle concentrations, and Reynolds number on the heat transfer coefficient and pressure drop of nanofluids are examined using the finite volume method.

TL;DR: In this article, the structural and morphological properties of the nanostructure ZnO film have been investigated and the X-ray diffraction spectra indicated that the films are of polycrystalline nature.

TL;DR: Nanocrystalline Cd-doped ZnO has been obtained by hydrothermal synthesis and characterized by powder X-ray diffraction, energy dispersive Xray spectrum, high resolution scanning electron micrographs and UV-visible diffuse reflectance, photoluminescence and electrochemical impedance spectra.

TL;DR: In this article, the structural, electronic properties and relative stability of quasi-two-dimensional (2D) free-standing planar nano-block (NBs) structures were examined within first principles calculations in comparison with parent MAX phases Ti3AlC2 and Ti2AlC.

TL;DR: In this paper, spherical ZnO nanorods were synthesized directly from an aqueous zinc acetate dihydrate solution in the presence of the poly(ethylene oxide)-b -poly(propylene oxide) copolymer at a mole ratio of Zn 2+ :OH − ǫ − Â = 1:10.

TL;DR: In this paper, a simple template-free and low-temperature aqueous solution route was used to synthesize hierarchical ZnO microspheres with hydrophobicity.

TL;DR: In this paper, the effect of Ag2S, MCM-41 support and different wt% of Ag 2S over the support on the photocatalytic degradation and influence of parameters such as Ag 2 S loading, catalyst a mount, pH and initial concentration of dye on degradation are evaluated.

TL;DR: The effect of Ti contents on the crystalline structure and optical properties of the as-deposited ZnO:Ti films was systematically investigated by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and fluorescence spectrophotometer.

TL;DR: In this paper, the transparent electrode properties of Ga-doped (3.0 at%) zinc oxide (GZO) films deposited by pulsed DC magnetron sputtering and the device performance of organic light emitting diodes (OLEDs) using GZO as an anode layer.

TL;DR: In this paper, the indium-doped ZnO film was used as the transparent conductive layer to replace the ITO layer, and the branch-like structures on the 2-wt% indiumdoped film yielded the photovoltaic properties with a short-circuit current density of 3.96 mA/cm 2, an opencircuit voltage of 0.72 ǫV, a fill factor of 20% and an overall power conversion efficiency of

TL;DR: In this article, a 2D hexagonal structure of ZnO was successfully prepared using electrochemical deposition (ECD) method on a quartz substrate pre-coated with indium-doped zinc oxide layer.