Tin dioxides (SnO2) nanostructure can be grown by vapor transport techniques through a vapor-liquid-solid (VLS) mechanism. The gas flowing have been effect on the evolution of various sizes and shapes of nanostructure materials. The crystalline structures of SnO2materials were investigated by X-ray diffraction (XRD) spectroscopy. XRD patterns of samples exhibited tetragonal phase. The characterization of synthesized products was performed by scanning electron microscopy (SEM). The controlling of process gas flow, showed the various kinds of nanostructures such as nanobelts, nanowires and nanobars of SnO2. The Raman spectra of single-crystalline rutile SnO2nanostructures were studied, the vibration modes were observed corresponded to the typical feature of the SnO2nanostructure. A room temperature photoluminescence (PL) spectrum of SnO2material exhibited visible emission.
Tin dioxide (SnO2) materials are prepared by using vapor transport techniques through a vapor-liquid-solid (VLS) mechanism from Tin (Sn) powder. The SnO2 materials are synthesized onto the silicon substrate at temperatures 850 0C. Crystalline structure of SnO2 nanowires was investigated by X-ray diffraction (XRD) spectroscopy. XRD patterns of SnO2 exhibited tetragonal rutile structure with lattice parameters of a = 4.73 oA and c = 3.18 oA. Surface morphology of SnO2 films was characterized by scanning electron microscope (SEM), that SEM micrographs indicate nanowires-like structure. The Raman spectra of single-crystalline rutile SnO2 nanowires were studied, three vibration modes were observed at 475, 635 and 775 cm-1 corresponded to the typical feature of the SnO2 nanowires. A room temperature photoluminescence (PL) spectrum of SnO2 nanowires were in visible emission range.
Thin films of Nickel Phthalocyanine (NiPc) are prepared at a base pressure of 10-6 mbar using Organic Evaporator System. The films are deposited onto the glass substrate at various temperatures of 100 0C, 120 0C, 140 0C and 160 0C. Crystalline of NiPc thin films was investigated by X-ray diffraction (XRD) spectroscopy. XRD patterns exhibit to become aggravated crystalline films as monoclinic structure. Surface morphology of NiPc thin films was characterized by field emission scanning electron microscope (FE-SEM). FE-SEM micrographs indicate that fiber-like morphology of NiPc is enhanced with increasing substrate temperature. The optical absorption spectra of these thin films are measured. Present studies reveal that the Q-band of NiPc thin films appears as the change of electron energy level. Absorption spectra obtained from UV-vis of deposited NiPc are declined as the substrate temperature is risen.
Sb-doped ZnO nanostructures have been deposited on to glass substrates via microwave-assisted process form Zn-Sb with different 1, 2 and 3 % by atomic weight. As the Sb/Zn mole ratio of the microwave oven materials increases, the Sb content doped in to the ZnO increases size, and the shape of the ZnO nanomaterials could be controlled via doping Sb. The structural and properties of undoped and doped ZnO were characterized by various techniques including by X-ray diffraction (XRD), scanning electron microscope (SEM) and UV-visible spectroscopy. Finally, the controlled growth mechanism of ZnO nanomaterials was discussed in detail.
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