ABSTRACT We study the growth of TiO2 thin film using simple spin coating technique. In this paper... more ABSTRACT We study the growth of TiO2 thin film using simple spin coating technique. In this paper, the effect of heat treatment to the TiO2 thin film was investigated within heat treatment in open and closed environment. In open environment, the heat treatment was carried using hot plate and in closed environment the heat treatment was carried in an oven. TiO2 solution was prepared with titanium butoxide as precursor, glacial acetic acid as a chelating agent, ethanol as solvent and deionised water. Triton X-100 acts as a stabilizer to avoid precipitation in solution and to increase the conductivity of films. To our knowledge there are no research comparing the influence of open and closed environment during heat treatment. Smaller grain size was found in nanostuctured TiO2 thin film with closed environment. At low magnification of FESEM image, it was shown that the crack-free was occur when nanostuctured TiO2 thin film is in closed environment compared to open environment. At high magnification there no significant on the structure was observed. In addition, no change in their crystallinity was found. The resistivity (current versus voltage) have smaller different due to the different structure on nanostructured TiO2 thin film.
Zinc oxide (ZnO) thin films, micro‐ and nanostructures are promising candidates for applications ... more Zinc oxide (ZnO) thin films, micro‐ and nanostructures are promising candidates for applications in optoelectronic devices. In this work, low cost sol‐gel spin coating and hydrothermal techniques were used to fabricate the ZnO films on glass substrates and ZnO microstructures on ...
A blend of anatase-rutile phase of titanium dioxide could be a new finding for many applications.... more A blend of anatase-rutile phase of titanium dioxide could be a new finding for many applications. The hurdle lies on the transformation temperature. Understanding the mechanism of the phase transformation is merely important. In this work, a set of Titanium dioxide deposited on glass by RF magnetron sputtering deposition system has been prepared, subsequently it was annealed at different temperatures ranging from 300-700°C for the duration of 1h. The influence of the post-annealing on the structural and bonding behavior for phase transformation have been investigated by X-ray Diffraction (XRD, expert powder), and Raman spectroscopy (Raman, Horiba). The phase transformation from anatase to rutile occurs at temperature 500°C to 700°C. The crystal plane of anatase phase shows dominant at (200) and (204) for 700°C, while (101) and (111) for 500°C post-annealing temperature. The Raman spectroscopy exhibits the correlation behavior with XRD for intensity peak broadening and shifting of Raman shift with increasing temperature.
Synthesis and Reactivity in Inorganic Metal-organic and Nano-metal Chemistry, May 27, 2010
Zinc oxide(ZnO) is an emerging optoelectronic material in large area electronic applications that... more Zinc oxide(ZnO) is an emerging optoelectronic material in large area electronic applications that are due to its various functional behaviors. We present the fabrication and characterizations of ZnO nanorods. The ZnO nanorods were synthesized using sol-gel hydrothermal ...
Journal of Nanoscience and Nanotechnology, Oct 1, 2010
Zinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applications due... more Zinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applications due to its various functional behaviors. We present the fabrication and the characterization of ZnO nanorods. The ZnO nanorods were synthesized using sol-gel hydrothermal technique on oxidized silicon substrates. Different post-annealing temperatures were explored in the sol-gel hydrothermal synthesis of the ZnO nanorods. The surface morphology of the ZnO nanorods were examined using scanning electron microscope (SEM). In order to investigate the structural properties, the ZnO nanorods were measured using X-ray diffractometer (XRD). The optical properties were measured using ultraviolet-visible (UV-Vis) spectroscopy. The influence of the post-annealing temperature on the realized ZnO nanorods will be revealed and discussed in this paper.
PurposeZinc oxide (ZnO) is an emerging optoelectronic material due to its various functional beha... more PurposeZinc oxide (ZnO) is an emerging optoelectronic material due to its various functional behaviors. The purpose of this paper is to report on the fabrication and characterizations of ZnO microrods.Design/methodology/approachZnO microrods were synthesized using sol‐gel immerse technique on oxidized silicon (Si) substrates. The oxidized Si substrates were immersed in ZnO aqueous solution for different times ranging from three to five hours. The surface morphologies of the ZnO microrods were examined using scanning electron microscope (SEM). In order to investigate the structural properties, the ZnO microrods were measured using an X‐ray diffractometer (XRD). The optical properties were measured using a photoluminescence (PL) spectrophotometer.FindingsCharacterization from SEM shows an enhanced growth of the ZnO rods with increasing immerse time. XRD characterizations demonstrate sharp and narrow diffraction peaks peculiar to ZnO, which implies that the rod is of high crystallinity. Based on the PL spectra, long immerse time results in the high peak in the UV region.Originality/valueThis paper concludes that the immerse time exerts an influence on the ZnO microrods. A longer immerse duration is preferred in the fabrication of the ZnO microrod, which is considered an emerging material for many advanced electronic and optoelectronic applications.
ABSTRACT This study is to investigate the effect of polyethylene glycol (PEG) on the structural a... more ABSTRACT This study is to investigate the effect of polyethylene glycol (PEG) on the structural and electrical properties of TiO2 thin film derived from sol-gel technique. In this study, the gradual changes were investigated along with small variation of PEG content. The correlation between main technological parameter with the materials properties was investigated towards solar cell application.
Zinc oxide (ZnO) thin films are very promising candidates for applications in emerging thin-films... more Zinc oxide (ZnO) thin films are very promising candidates for applications in emerging thin-films transistors and solar cells. In this paper, low cost sol-gel spin coating technique was used to fabricate the ZnO films on glass substrates. The sol-gel fabrication process of the ZnO films is described. The influence of ageing duration in the spin coating process on the material
AbstractZinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applica... more AbstractZinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applications due to its various functional behaviors. We present the fabrication and characterizations of ZnO nanostructures. The ZnO nanostructures consisting of nanorods were synthesized using ...
Student Conference on Research and Development, Jun 25, 2003
Three-phase induction motors are the most popular and widely used machines in industry. An induct... more Three-phase induction motors are the most popular and widely used machines in industry. An induction motor is essentially a constant speed motor, however in many applications there is a need of several speeds or continuously adjustable range of speed. The aim of this project is to apply a new method called binary technique for controlling the speed of induction motor.
ABSTRACT We study the growth of TiO2 thin film using simple spin coating technique. In this paper... more ABSTRACT We study the growth of TiO2 thin film using simple spin coating technique. In this paper, the effect of heat treatment to the TiO2 thin film was investigated within heat treatment in open and closed environment. In open environment, the heat treatment was carried using hot plate and in closed environment the heat treatment was carried in an oven. TiO2 solution was prepared with titanium butoxide as precursor, glacial acetic acid as a chelating agent, ethanol as solvent and deionised water. Triton X-100 acts as a stabilizer to avoid precipitation in solution and to increase the conductivity of films. To our knowledge there are no research comparing the influence of open and closed environment during heat treatment. Smaller grain size was found in nanostuctured TiO2 thin film with closed environment. At low magnification of FESEM image, it was shown that the crack-free was occur when nanostuctured TiO2 thin film is in closed environment compared to open environment. At high magnification there no significant on the structure was observed. In addition, no change in their crystallinity was found. The resistivity (current versus voltage) have smaller different due to the different structure on nanostructured TiO2 thin film.
Zinc oxide (ZnO) thin films, micro‐ and nanostructures are promising candidates for applications ... more Zinc oxide (ZnO) thin films, micro‐ and nanostructures are promising candidates for applications in optoelectronic devices. In this work, low cost sol‐gel spin coating and hydrothermal techniques were used to fabricate the ZnO films on glass substrates and ZnO microstructures on ...
A blend of anatase-rutile phase of titanium dioxide could be a new finding for many applications.... more A blend of anatase-rutile phase of titanium dioxide could be a new finding for many applications. The hurdle lies on the transformation temperature. Understanding the mechanism of the phase transformation is merely important. In this work, a set of Titanium dioxide deposited on glass by RF magnetron sputtering deposition system has been prepared, subsequently it was annealed at different temperatures ranging from 300-700°C for the duration of 1h. The influence of the post-annealing on the structural and bonding behavior for phase transformation have been investigated by X-ray Diffraction (XRD, expert powder), and Raman spectroscopy (Raman, Horiba). The phase transformation from anatase to rutile occurs at temperature 500°C to 700°C. The crystal plane of anatase phase shows dominant at (200) and (204) for 700°C, while (101) and (111) for 500°C post-annealing temperature. The Raman spectroscopy exhibits the correlation behavior with XRD for intensity peak broadening and shifting of Raman shift with increasing temperature.
Synthesis and Reactivity in Inorganic Metal-organic and Nano-metal Chemistry, May 27, 2010
Zinc oxide(ZnO) is an emerging optoelectronic material in large area electronic applications that... more Zinc oxide(ZnO) is an emerging optoelectronic material in large area electronic applications that are due to its various functional behaviors. We present the fabrication and characterizations of ZnO nanorods. The ZnO nanorods were synthesized using sol-gel hydrothermal ...
Journal of Nanoscience and Nanotechnology, Oct 1, 2010
Zinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applications due... more Zinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applications due to its various functional behaviors. We present the fabrication and the characterization of ZnO nanorods. The ZnO nanorods were synthesized using sol-gel hydrothermal technique on oxidized silicon substrates. Different post-annealing temperatures were explored in the sol-gel hydrothermal synthesis of the ZnO nanorods. The surface morphology of the ZnO nanorods were examined using scanning electron microscope (SEM). In order to investigate the structural properties, the ZnO nanorods were measured using X-ray diffractometer (XRD). The optical properties were measured using ultraviolet-visible (UV-Vis) spectroscopy. The influence of the post-annealing temperature on the realized ZnO nanorods will be revealed and discussed in this paper.
PurposeZinc oxide (ZnO) is an emerging optoelectronic material due to its various functional beha... more PurposeZinc oxide (ZnO) is an emerging optoelectronic material due to its various functional behaviors. The purpose of this paper is to report on the fabrication and characterizations of ZnO microrods.Design/methodology/approachZnO microrods were synthesized using sol‐gel immerse technique on oxidized silicon (Si) substrates. The oxidized Si substrates were immersed in ZnO aqueous solution for different times ranging from three to five hours. The surface morphologies of the ZnO microrods were examined using scanning electron microscope (SEM). In order to investigate the structural properties, the ZnO microrods were measured using an X‐ray diffractometer (XRD). The optical properties were measured using a photoluminescence (PL) spectrophotometer.FindingsCharacterization from SEM shows an enhanced growth of the ZnO rods with increasing immerse time. XRD characterizations demonstrate sharp and narrow diffraction peaks peculiar to ZnO, which implies that the rod is of high crystallinity. Based on the PL spectra, long immerse time results in the high peak in the UV region.Originality/valueThis paper concludes that the immerse time exerts an influence on the ZnO microrods. A longer immerse duration is preferred in the fabrication of the ZnO microrod, which is considered an emerging material for many advanced electronic and optoelectronic applications.
ABSTRACT This study is to investigate the effect of polyethylene glycol (PEG) on the structural a... more ABSTRACT This study is to investigate the effect of polyethylene glycol (PEG) on the structural and electrical properties of TiO2 thin film derived from sol-gel technique. In this study, the gradual changes were investigated along with small variation of PEG content. The correlation between main technological parameter with the materials properties was investigated towards solar cell application.
Zinc oxide (ZnO) thin films are very promising candidates for applications in emerging thin-films... more Zinc oxide (ZnO) thin films are very promising candidates for applications in emerging thin-films transistors and solar cells. In this paper, low cost sol-gel spin coating technique was used to fabricate the ZnO films on glass substrates. The sol-gel fabrication process of the ZnO films is described. The influence of ageing duration in the spin coating process on the material
AbstractZinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applica... more AbstractZinc oxide (ZnO) is an emerging optoelectronic material in large area electronic applications due to its various functional behaviors. We present the fabrication and characterizations of ZnO nanostructures. The ZnO nanostructures consisting of nanorods were synthesized using ...
Student Conference on Research and Development, Jun 25, 2003
Three-phase induction motors are the most popular and widely used machines in industry. An induct... more Three-phase induction motors are the most popular and widely used machines in industry. An induction motor is essentially a constant speed motor, however in many applications there is a need of several speeds or continuously adjustable range of speed. The aim of this project is to apply a new method called binary technique for controlling the speed of induction motor.
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