Nano Archive

Influence of Oxygen Pressure on Structural and Sensing Properties of β-Ga 2 O 3 Nanomaterial by Thermal Evaporation

Hai-Lin, Ma and Duo-Wang, Fan (2009) Influence of Oxygen Pressure on Structural and Sensing Properties of β-Ga 2 O 3 Nanomaterial by Thermal Evaporation. Chinese Physics Letters, 26 (11). p. 117302.

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Official URL: http://stacks.iop.org/0256-307X/26/i=11/a=117302

Abstract

We prepare the gallium oxide (β-Ga 2 O 3 ) 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-Ga 2 O 3 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.

Item Type:Article
ID Code:11301
Deposited By:Prof. Alexey Ivanov
Deposited On:01 Nov 2011 23:34
Last Modified:02 Nov 2011 00:47

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