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Cr/CrN nano-multilayers have been produced by varying the period and the degree of unbalancing in a magnetron sputtering system in order to study the influence of these parameters in the electrical properties. X-ray Diffraction (XRD) was used to investigate the microstructure characteristics of the multilayers and the Four Point Probe (FPP) technique in the Van der Pawn mode was used to evaluate electrical...
The nanocrystalline Cu2O has been successfully prepared by the solvent-thermal method using CuSO4·5H2O and NaOH as the raw materials and glucose as the reducing agent. The Cu2O prepared was characterized by X-ray diffraction(XRD) and transmission electron microscopy(TEM). The degradation of methylene blue using Cu2O as catalyst without lights and stirring was investigated, and the best catalytic condition...
The paper prepares Mg-based bulk metallic amorphous and nanocrystalline nano-materials-Mg65Cu25Y10-by acoustic frequency induction melting and rapid quenching in quartz glass tube. Making use of X-Ray diffraction (XRD), Environmental scanning electron microscopy (ESEM), Transmission electron microscopy (TEM), Atomic force microscopy (AFM), Electron probe microanalysis (EPMA) and so on, it is proved...
Nano-layered films of Cu/Cu(Zr)/Zr(Ge) and Cu/Cu(Zr) were deposited on the Si/SiOC:H substrates by magnetron sputtering. Samples were subsequently annealed at temperatures ranging from 350~500??C in vacuum, and characterized by four-point probe technique, glancing incident angle X-ray diffraction, Auger electron spectroscopy (AES) and transmission electron microscopy. The results indicated that the...
Nanoelectrospun fibers of MFe2O4 (M = Ni0.25-Cu0.25-Zn0.5) were fabricated by electrospinning technique using PVP solution and and metal nitrate as starting materials. The as spun fibers were calcined at different temperatures of 500, 600, 700 and 800??C. The results from XRD indicated that the calcined nanofibers structure was face center cubic (fcc) with the lattice constant a = 0.83976 ?? 0.00028...
This paper reports the grown of Ni/Cu multilayers on Si monocrystalline substrates and shows some polarization investigations of Si(100) substrates. Nano structural characterization of the multilayers by high angle X-ray diffraction (XRD) and high temperature X-ray diffraction (HT-XRD) also have been presented. Annealed Ni/Cu multilayers on Si(100) substrate has been reported. The main purpose of...
CuO nanorods were prepared by microwave-assisted method in the ionic liquid 1-butyl-3-methylimidazole tetrafluoroborate which is synthesized by method of substitution halogenated hydrocarbons for organic macromolecular (methylimidazole) in this experiment. The samples were characterized by means of IR spectroscopy, X-ray powder diffraction (XRD), scan electron microscopy (SEM) and transmission electron...
Nanostructured copper(II) oxide film was deposited using reactive DC magnetron sputtering. It has been characterized using XRD, EDAX, XPS, and FESEM. The grain size of copper oxide film was found to be 40-65 nm with size distribution. The entire study was divided into two parts. In the first part, the film has been studied for its response to alcohol at different temperatures to find the optimum sensing...
Controlled doping appropriate elements into semiconductor nanostructures is of vital importance to develop novel materials and functional devices. Herein, we present three methods to synthesize Cu-doped ZnO nanostructures using a simple vapor phase transport process and adopting CuCl2, CuO or Cu as doping precursors. The corresponding morphology, structure, and chemical composition were investigated...
We report thermoelectric characterization of Bi2-xSbxTe3 (x = 0.5, 1.0, and 1.5) synthesized by a solvothermal method using DMF as solvent. For Bi2Te3, the size of the edge and thickness of the hexagonal nanoplatelets are 200-250 nm and 20-25 nm, respectively. Bi2Te3 nanosheets appear to grow epitaxially from the surface of the Te tubes, which forms in the first step and acts as the template for the...
Bulk nanostructured (Bi,Sb)2Te3 compounds and GeTe based amorphous/nanocrystal composites have been successfully fabricated by the combined hydrothermal/hot-pressing and quenching/annealing methods, respectively. The (Bi,Sb)2Te3 nanopowders synthesized by hydrothermal method exhibit a hollow-like structure. After hot-pressing, the nanoscale grains varying from tens to hundreds of nanometers were found...
Nanostructuring is one of the effective approaches to lower the thermal conductivity of materials. Nanostructured skutterudite-related compounds CoSb3, Fe0.5Ni0.5Sb3, Fe0.25Ni0.25Co0.5Sb3 and Te-doped CoSb3 were synthesized by a solvothermal route. The bulk materials were prepared by hot pressing or spark plasma sintering from the solvothermally synthesized nanopowders. The thermal conductivity values...
Turbostratic mesoporous carbons were synthesized by catalytic decomposition of acetylene over Cu/MgO or Cu/Al2O3 catalysts. The carbon samples were characterized by X-ray diffraction (XRD), nitrogen adsorption, transmission electron microscopy (TEM) and thermo gravimetric analyser (TGA). The decomposition of temperature was found having crucial effect on the micro structure and reactivity of carbon...
We present here our results on the synthesis and characterization of transition metal (TM) doped-ZnO nanocrystals, where (TM= Co, Ni, Fe, Cu and Cr). Stable suspensions of these materials were produced in ethanol solution at room-temperature condition. liquors. XRD characterization of doped systems confirmed the exclusive formation of the host ZnO wurtzite structure. The incorporation of dopant species...
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