Ma Hai-Lin and Fan Duo-Wang 2009 Chinese Phys. Lett. 26 117302 doi:10.1088/0256-307X/26/11/117302
Ma Hai-Lin1,2 and Fan Duo-Wang1,2
Show affiliationsWe prepare the gallium oxide (β-Ga2O3) nanomaterials from gallium and oxygen by thermal evaporation in the argon atmosphere and research their oxygen sensing under UV illumination with different oxygen pressures. X-ray diffraction reveals that the synthesized product is monoclinic gallium oxide, it is further confirmed by electron diffraction of transmission electron microscope, and its morphology through the observation using scanning electron microscope reveals that β-Ga2O3 nanobelts with a breadth less than 100 nm and length of several micrometers are synthesized under low oxygen pressure, while the nano/microbelts are synthesized under high oxygen pressure. Room-temperature oxygen sensing is tested under at 254 nm illumination and it is found that the current decreases quickly first and then slowly with oxygen pressure from low to high.
81.16.-c Methods of nanofabrication and processing
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
61.46.-w Structure of nanoscale materials
68.65.-k Low-dimensional, mesoscopic, and nanoscale systems: structure and nonelectronic properties
Instrumentation and measurement
Surfaces, interfaces and thin films
Issue 11 (November 2009)
Received 30 July 2009
Ma Hai-Lin and Fan Duo-Wang 2009 Chinese Phys. Lett. 26 117302
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