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Soft-chemistry Based Fabrication of Gallium Nitride Nanoparticles
Yi Chen,Mohammad Maniruzzaman1,김재환 한국정밀공학회 2011 International Journal of Precision Engineering and Vol.12 No.3
Gallium nitride (GaN) nanoparticles were fabricated with two different fabrication processes based on soft-chemistry methods, and the results were compared. Before fabricating GaN, gallium oxide peroxide (GaO(OH)) nanorods or amorphous gallium oxide (Ga2O3) particles were fabricated. For the first method, the gallium nitride (Ga(NO3)3) was dissolved into the nitric acid and adjusted pH to approximately 7. The solid-sol was converted to Ga2O3 by heating at 400 °C for 4 h. The Ga2O3 was converted to GaN in a tube furnace at 900 °C for 1 h with ammonia flow. The synthesized GaN has spherical crystalline structure. For the second method, Ga(NO3)3 was dissolved in deionized water and adjusted pH to 5 and 7 using potassium hydroxide. Well-defined and uniform diameter (approximately 200 nm) and length (approximately 1000 nm) of GaO(OH) nanorods were fabricated. For the pH 7 case, the length of the nanorods became approximately 500 nm. The nanorods became a spherical shape after conversion. X-ray diffraction patterns of the GaN nanoparticles showed a wurtzite structural characteristic.
Titanium Dioxide Sol-gel Schottky Diodes and Effect of Titanium Dioxide Nanoparticle
Maniruzzaman, Mohammad,Zhai, Lindong,Mun, Seongcheol,Kim, Jaehwan The Korean Institute of Electrical Engineers 2015 Journal of Electrical Engineering & Technology Vol.10 No.6
This paper reports the effect of Titanium dioxide (TiO<sub>2</sub>) nanoparticles on a TiO<sub>2</sub> sol-gel Schottky diode. TiO<sub>2</sub> nanoparticles were blended with TiO<sub>2</sub> sol-gel to fabricate the Schottky diode. TiO<sub>2</sub> nanoparticles showed strong anatase and rutile X-ray diffraction peaks. However, the mixture of TiO<sub>2</sub> sol-gel and TiO<sub>2</sub> nanoparticles exhibited no anatase and rutile peaks. The forward current of the Schottky diode drastically increased as the concentration of TiO<sub>2</sub> nanoparticles increased up to 10 wt. % and decreased after that. The possible conduction mechanism is more likely space charge limited conduction.
Titanium Dioxide Sol-gel Schottky Diodes and Effect of Titanium Dioxide Nanoparticle
Mohammad Maniruzzaman,Lindong Zhai,Seongcheol Mun,Jaehwan Kim 대한전기학회 2015 Journal of Electrical Engineering & Technology Vol.10 No.6
This paper reports the effect of Titanium dioxide (TiO₂) nanoparticles on a TiO₂ sol-gel Schottky diode. TiO₂ nanoparticles were blended with TiO₂ sol-gel to fabricate the Schottky diode. TiO₂ nanoparticles showed strong anatase and rutile X-ray diffraction peaks. However, the mixture of TiO₂ sol-gel and TiO₂ nanoparticles exhibited no anatase and rutile peaks. The forward current of the Schottky diode drastically increased as the concentration of TiO₂ nanoparticles increased up to 10 wt. % and decreased after that. The possible conduction mechanism is more likely space charge limited conduction.