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The crystallographic properties of AlN films doped with 3d transition metal (3d-TM: Ti, V, and Cr, concentration x: 0–12 %) showing distinctive optical absorption structures in visible light region were investigated. The films were prepared on SiO2 glass substrates by rf sputtering. X-ray diffraction (XRD), transmission electron microscopy (TEM), and 3d-TM K-edge X-ray absorption fine structure (XAFS)...
Mercuric iodide and bismuth tri-iodide nanoparticles were synthesized by suspension in octadecene, from Hg(NO3)2. H2O and I2, and from Bi(NO3)3. 5H2O and I2, respectively. The best synthesis conditions were 2 hrs. at 60-70 oC, followed by 10 min. at 95-110 oC for mercuric iodide nanoparticles, and 4 hrs. at 80-110 oC, followed by 10 min. at 180-210 oC for bismuth tri-iodide ones. Nanoparticles were...
The NiCoFerrite nanoparticle has been prepared using thermal method. Polyvinyl pyrrolidon (PVP) was used as a reducing agent due to its reducing effect on agglomeration of particles. The characterization studies such as X-ray diffraction (XRD) and transmission electron microscopy (TEM) have been done for explore the particles size. By Scherer's equation the average particles size has been estimated...
Nanoporous SnO2 with high photocatalytic activity has been successfully prepared by a photochemical method. The as-synthesized sample was characterized by XRD, N2 adsorption-desorption, TEM, UV/vis and FTIR. The photocatalytic activity of the sample was evaluated by the decomposition of methyl orange(MO) aqueous solution under different light source(UV, sunlight and visible light) and was compared...
Regularly faceted copper (Cu) particles ranging from tens of nanometers to submicron were obtained by annealing Cu-Zr films on polyimide and single Si (100) substrates. XRD, TEM, SEM and EDS were used to characterize their microstructural properties. The results show that these particles are pure Cu element and single crystals with [111] preferred orientation. Systematical analysis demonstrates that...
The flame-made (5/5) pure ZnO and WO3-doped ZnO nanoparticles containing 0.25, 0.50, and 0.75 mol% of WO3 were successfully synthesized by flame spray pyrolysis (FSP). These materials were studied for NO2, CO and H2 gas sensing at different gas concentrations and operating temperatures ranging from 300-400??C in dry air. The crystalline phase, morphology and size of the nanoparticles were characterized...
The processes for the physical vapor deposition (PVD) of Pb(Zr,Ti)O3 (PZT) thin films from two different composite oxide targets has been demonstrated. PZT thin films have been deposited by both PVD or sputter technique and standard sol-gel method. Half micron PZT films were deposited by both methods on identical substrates (Si[(100) 4 inch Cz wafer]/SiO2/Ti-TiO2/Pt) followed by sputter-deposited...
The CdSe nanoparticles have been synthesized by hot-injection method, and thermal annealing was used to improve the crystallinity of synthesized nanoparticles and reconstruct the surface of nanoparticles. The synthesized and annealed CdSe nanoparticles were characterized by TEM, XRD and PL spectra. After thermal annealing followed by a solvent exchange process, the CdSe nanoparticles were used to...
In this paper the response of printed thick-film of WO3 doped by Y2O3 to organic solvent was studied. Different ratio of doping was prepared and changes of film resistance at different temperature in present of vaporized types of alcohol were observed. The results showed a high sensitivity of the film of 80.1%WO3-18.8%Y2O3 to Toluene, Xylene, Methanol, and 2-Propanone (Acetone) at 250, 450, and 550degC,...
Development of organic and inorganic composites has grown in recent years due to a wide range of potential use of these materials. The aim of this research is to investigate the effect of Pani additions on the TiO2 based thin film as VOC gas sensing properties. TiO2 were prepared using sol gel technique. Up to 3 wt% of Pani were directly added to the TiO2 solution. 3 layers of TiO2/Pani solution mixture...
The accommodation field of YBa2Cu3O6+infin (YBCO) a thin films depends on the microstructure of the films and specifically the amount of pinning sites, which can be controlled by the type of the target used in the laser deposition. Typical values for the accommodation field at 5 K are 40-100 mT, 160 mT and 500 mT for films deposited from a micrograined, nanograined and optimally BaZrO3 (BZO) doped...
As the size of metal oxide semiconductor devices continues to be scaled down to sub-90 nm, novel materials must be integrated successfully in order to meet the technical demands. Nickel silicide (NiSi) is being considered as an alternative material to cobalt silicide (CoSi2) for the self-aligned silicide process, because it forms at lower temperatures with less silicon consumption and is compatible...
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