Effect of Temperature and Synthesis of ZnO Nanostructures on Zn Plate by Thermal Method

2013 ◽  
Vol 634-638 ◽  
pp. 2163-2165
Author(s):  
Oamphon Thongteel ◽  
Vatcharinkorn Mekla ◽  
Udom Tipparach
Keyword(s):  
Metal Plate ◽  
Effect Of Temperature ◽  
Thermal Method ◽  
Zno Nanostructures ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Thermal Evaporation Method ◽  
Xrd Pattern ◽  
X Ray ◽  
Metal Plates

ZnO nanostructures were synthesized by thermal evaporation method using Zn metal plate in air. The Zn metal plates were frozen at -10 C, before into the furnace at a temperature ranging from 300 to 420 C for 15 minutes. The ZnO nanostructures were characterized by X-ray diffraction, XRD and field emission scanning electron microscopy( FE-SEM) and X-ray diffraction( XRD) pattern showed the crystal nanostructure of ZnO. FE-SEM images indicated that the nanowires were depended on temperatures. The diameter of ZnO nanowires werevaried from 50 nm to 70 nm and length of several 100 micrometers.

Effect of Temperature and Synthesis of CuO Nanostructures on Cu Plate by Thermal Method

2013 ◽  
Vol 634-638 ◽  
pp. 2160-2162 ◽  
Author(s):  
Benjara Supakosl ◽  
Vatcharinkorn Mekla ◽  
Chakkaphan Raksapha
Keyword(s):  
Thermal Evaporation ◽  
Metal Plate ◽  
Effect Of Temperature ◽  
Thermal Method ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Thermal Evaporation Method ◽  
Xrd Pattern ◽  
X Ray ◽  
20 Nm

CuO nanostructures were synthesized by thermal evaporation method using Cu metal plate in air at temperatures ranging from 400 to 600 C for 6 h. The CuO nanostructures were characterized by X-ray diffraction, XRD and field emission scanning electron microscopy, FE-SEM. X-ray diffraction, XRD pattern showed the bicrystal nanostructure of CuO and Cu2O. FE-SEM images indicated that the nanowires depended on temperatures. The diameter of Cuo nanowires varies from 10 nm to 20 nm and length of several 5 micrometers.

The Transformation of ZnO Nanostructures Prepared by Thermal Evaporation

2014 ◽  
Vol 1061-1062 ◽  
pp. 180-183
Author(s):  
Vatcharinkorn Mekla ◽  
Udom Tipparach
Keyword(s):  
Thermal Evaporation ◽  
Hexagonal Wurtzite Structure ◽  
Metal Plate ◽  
Zno Nanowires ◽  
Zno Nanostructures ◽  
Sem Images ◽  
Thermal Evaporation Method ◽  
Metal Plates ◽  
Xrd Patterns ◽  
20 Nm

ZnO nanostructures prepared by thermal evaporation method using Zn metal plate in water vapor were invitigated. The Zn metal plates were ultrasinically cleaned at room temperature and then heated in a furnace at temperatures ranging from 350 to 430 °C for 2 hours. The ZnO nanostructures were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). XRD patterns show the ZnO hexagonal wurtzite structure. SEM images indicate that the ZnO structures depend on preparation temperatures. The density of ZnO nanostructures increase as the temperature increases. The transformation of ZnO nanostructures was observed to be temperature dependence. The nanostructures are nanorods when prepared at temperature below 400 °C, nanowires when prepared at 400 °C, and nanoflakes when prepared temperatures of 410 °C or higher. This approach provides the capability of creating patterned 1D ZnO nanowires at 430 °C. The diameter of ZnO nanowires werevaried from 20 nm to 70 nm and length of several 400 micrometers.

In2O3-ZnO heterostructure development in electrical and photoluminescence properties of In2O3 1-D nanostructures

2014 ◽  
Vol 28 (16) ◽  
pp. 1450101 ◽  
Author(s):  
M. Shariati ◽  
V. Ghafouri
Keyword(s):  
Growth Mechanism ◽  
X Ray Diffraction ◽  
Thermal Evaporation Method ◽  
Xrd Pattern ◽  
One Dimensional ◽  
X Ray ◽  
1D Nanostructures ◽  
Vapor Liquid Solid Mechanism ◽  
Vls Growth ◽  
Spherical Caps

Indium Oxide quasi one-dimensional (1D) nanostructures known as nanowires and nanorods synthesis using the thermal evaporation method, has been articulated. To nucleate growth sites, substrate seeding promoted 1D nanostructures growth. The catalyst-mediated growth mechanism showed more favorable morphologies and physical properties in under vacuum conditions associated with bottom-up technique. Scanning electron microscopy (SEM) results showed that the Zn -doped 1D nanostructures had spherical caps. The X-ray diffraction (XRD) pattern and energy-dispersive X-ray (EDX) spectrum indicated that these caps intensively associated with ZnO . Therefore, it was reasonable that the vapor–liquid–solid mechanism (VLS) was responsible for the growth of the In 2 O 3- ZnO heterostructure nanowires. This technique enhances optical and electrical properties in nanostructures. The photoluminescence (PL) analysis in Zn -doped In 2 O 3 nanowires and nanorods shows that the intensity of the visible and UV-region emissions overwhelmingly increases and resistance measurement professes the improvement of linear conductance in VLS growth mechanism.

Effect of Temperature on the Purity, Particle Size and Morphology of Fe2O3 Nanomaterials

2014 ◽  
Vol 895 ◽  
pp. 305-308 ◽  
Author(s):  
Abdul Rahman Noor Azreen ◽  
Norlida Kamarulzaman ◽  
Nurhanna Badar ◽  
Mustaffa Nur Amalina ◽  
Kamarudin Norashikin
Keyword(s):  
Effect Of Temperature ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Xrd Pattern ◽  
Weak Organic Acid ◽  
Irregular Shapes ◽  
Three Samples ◽  
Different Temperatures ◽  
Particle Size And Morphology ◽  
Size And Morphology

Iron Oxide, Fe2O3, has extensively been studied by many researchers because of their important uses for various applications such as magnetic storages, catalysts, anode, gas sensors and biomedical applications. In our work, Fe2O3 have been synthesized via a new self-propagating combustion (SPC) route using a weak organic acid as an oxidant. The precursor was annealed at three different temperatures. Three samples of Fe2O3 heated at 300 °C, 600 °C and 800 °C for 24 hours were characterized using X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM). The XRD pattern confirms that the crystal structure for both 600 °C and 800 °C samples are rhombohedral while for the 300 °C sample, rhombohedral and cubic phases are present. The SEM images showed that the 300 °C and 600 °C materials have irregular shapes. For the 800 °C sample the materials seem to be more crystalline with individual polyhedral shapes.

Sintering Temperatures Investigation on the Electrical Characteristics of Fe2TiO5/MnO2 Ceramics-Based NTC Thermistor

2018 ◽  
Vol 917 ◽  
pp. 74-77
Author(s):  
Wiendartun ◽  
Dadi Rusdiana ◽  
Andhy Setiawan
Keyword(s):  
Electrical Characteristic ◽  
Electrical Characteristics ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Xrd Pattern ◽  
X Ray ◽  
Ntc Thermistor ◽  
Market Requirement ◽  
Electrical Data ◽  
Made In

Fabrication of Fe2TiO5 pellet/disk ceramics-based NTC thermistor has been performed, in order to know the effect of sintering tempertures on the electrical characteristic of 1.0 mole % MnO2 doped-Fe2TiO5 ceramics. These ceramics were made by mixing commercial powders of Fe2O3, TiO2 and MnO2 with proportional composition to produce Fe2TiO5 based ceramic. The raw pellet was sintered at 1100 °C, 1200 °C and 1300 °C temperature for 2 hours in air. Analysis of the microstructure and crystal structure were performed by using a scanning electron microscope (SEM) and x-ray diffraction (XRD) respectively. XRD pattern showed that all of Fe2TiO5 ceramics made ​​at various sintering temperatures are orthorhombic The SEM images showed that the grain size of pellet ceramics increase with increasing sintering temperatures. From electrical data that was measured at temperature 30-300 °C, showed that the addition of sintering temperature decreased the thermistor constant (B), activation energy (Ea), thermistor sensitivity (α) and room temperature resistance (RRT). Thermistor constant (B) of the ceramics was relatively big of 5778 K to 6707 K. The value of B indicated that ceramics made in this work fit the market requirement for NTC thermistor.

Characterization of Fe2O3 Nanowires and its Solar Cell Applications

2018 ◽  
Vol 766 ◽  
pp. 217-222
Author(s):  
Suphaporn Daothong
Keyword(s):  
Solar Cell ◽  
Iron Oxide ◽  
Oxidation Process ◽  
X Ray Diffraction ◽  
Sem Images ◽  
Xrd Pattern ◽  
Oxide Nanowires ◽  
X Ray ◽  
Dye Sensitized

Iron oxide nanowires were synthesized on stainless steel mesh substrate using the thermal oxidation process at the varying temperature of 750°C for 60 min. The samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD pattern showed that the iron oxide nanowires exhibited the structure of alpha-Fe2O3 (hematite). SEM images indicated that the diameter and the length of the nanowires were 80 to 285 nm and more than 5 μm, respectively. The dye-sensitized solar cell (DSC) properties based on the nanowires substrate was also studied. It was found that the power conversion efficiency (η) of the device was 0.11%.

Synthesis and Characterization of Superparamagnetic Fe3O4 Nanoparticles

2013 ◽  
Vol 750-752 ◽  
pp. 340-343 ◽  
Author(s):  
De Hui Sun ◽  
Jiao Wu ◽  
Ji Lin Zhang
Keyword(s):  
Room Temperature ◽  
Thermal Method ◽  
Gravimetric Analysis ◽  
X Ray Diffraction ◽  
Reaction Conditions ◽  
Xrd Pattern ◽  
X Ray ◽  
Magnetic Investigation ◽  
Average Size

We synthesized Fe3O4 nanoparticles using a solvent thermal method and characterized the morphologies, structures, surface properties, thermal stability and magnetism of the products by Field emission scanning electron microscopy (FE-SEM), Powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermal gravimetric analysis (TGA) and vibrating sample magnetometer (VSM). The experimental results showed that the Fe3O4 nanoparticles have a tunable average size range from 55 nm to 85 nm. Their diameters decreased with increase of precursor FeCl24H2O concentration or increase of the reaction time under other reaction conditions held constant. The XRD pattern confirmed that the Fe3O4 nanoparticles belong to cubic structure. Magnetic investigation reveals that the Fe3O4 nanoparticles have higher saturation magnetization and negligible coercivity at room temperature.

Investigation of ZnS Nanotubes Films: Morphological, Structural and Optical Properties

2019 ◽  
Vol 60 ◽  
pp. 142-153
Author(s):  
Bassam Abdallah ◽  
M. Kakhia ◽  
N. Alkafri
Keyword(s):  
Thermal Evaporation ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Sem Images ◽  
Xrd Pattern ◽  
X Ray ◽  
Atomic Force ◽  
Evaporation Technique ◽  
Pb Concentration

Pb doped ZnS nanotubes films have been deposited on glass and Si (100) substrates by a thermal evaporation technique. Energy dispersive spectroscopy (EDX) analysis has been used to identify the element’s compositions. Pb concentration in the prepared films was increased from 0 to about ~6 wt. %. The X- Ray Diffraction (XRD) pattern exhibited the wurtzite structure of ZnS with (002) preferred orientation. It shows that the calculated grain size increased with increase in Pb concentration. XRD analysis was also used to determine the strain in the films. Morphology and thickness of the films were obtained from surface and cross section of the films, using scanning electron microscopy (SEM) images. SEM images have confirmed the ZnS nanotubes and modifications of the morphology when adding Pb. Atomic force microscope (AFM) and SEM characterization have been shown dense structure and demonstrated the growth of spherical forms with nanostructure (nanotubes not created) for a film deposited without doping (0 wt. %). The transparency of the films has been deduced from UV-Vis spectra, where the band gap increased with increase in Pb concentration

Hydrothermal Synthesis of Flower-Like CuO/ZnO/SiNWs Photocatalyst for Degradation of R6G under Visible Light Irradiation

2017 ◽  
Vol 727 ◽  
pp. 847-852 ◽  
Author(s):  
Qi Feng ◽  
Shao Yuan Li ◽  
Wen Hui Ma ◽  
Xiao He ◽  
Yu Xin Zou
Keyword(s):  
Electron Microscopy ◽  
Precursor Solution ◽  
Zno Nanostructures ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Good Crystallinity ◽  
Narrow Width ◽  
Ultraviolet Emissions ◽  
Scanning Electron

Flower-like CuO/ZnO/SiNWs nanostructures were successfully synthesized on SiNWs substrates using a simple hydrothermal method. The characteristics of the CuO/ZnO/SiNWs nanostructures were investigated through scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV–vis spectrophotometer. SEM images revealed shape transitions when the precursor mass ratic increased from 50:50 to 5:95. The strong intensity and narrow width of XRD peaks indicate that CuO/ZnO nanostructures with high molarities have good crystallinity. The UV–vis spectro-photometer indicate that ultraviolet emissions shift slightly toward lower wavelengths with incr-easing precursor solution molarity and that the intensity increases with improvement in CuO/ZnO/SiNWs crystallization.The mechanism of CuO/ZnO/SiNWs for improvement in photocatalytic activity was also discussed.

High Resolution Replication of Organoclay Surfaces

1982 ◽  
Vol 40 ◽  
pp. 576-577
Author(s):  
W. W. Barker ◽  
W. E. Rigsby ◽  
V. J. Hurst ◽  
W. J. Humphreys
Keyword(s):  
Clay Mineral ◽  
Organic Molecule ◽  
Organic Molecules ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Naturally Occurring ◽  
Silicate Layers ◽  
Mineral Identification

Experimental clay mineral-organic molecule complexes long have been known and some of them have been extensively studied by X-ray diffraction methods. The organic molecules are adsorbed onto the surfaces of the clay minerals, or intercalated between the silicate layers. Natural organo-clays also are widely recognized but generally have not been well characterized. Widely used techniques for clay mineral identification involve treatment of the sample with H2 O2 or other oxidant to destroy any associated organics. This generally simplifies and intensifies the XRD pattern of the clay residue, but helps little with the characterization of the original organoclay. Adequate techniques for the direct observation of synthetic and naturally occurring organoclays are yet to be developed.

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