Preparation and NO2-gas sensing property of individual β-Ga2O3 nanobelt

doi:10.1088/1674-1056/19/7/076102

中国物理B ›› 2010, Vol. 19 ›› Issue (7): 76102-076102.doi: 10.1088/1674-1056/19/7/076102

Preparation and NO₂-gas sensing property of individual β-Ga₂O₃ nanobelt

牛晓山¹, 马海林², 范多旺²

(1)Lanzhou Dacheng Vacuum Technology Co. Ltd., Lanzhou 730070, China; (2)National Engineering Research Center of Green Coating Technology and Equipment, Lanzhou Jiaotong University, Lanzhou 730070, China

收稿日期:2009-11-19 出版日期:2010-07-15 发布日期:2010-07-15

Preparation and NO₂-gas sensing property of individual β-Ga₂O₃ nanobelt

Ma Hai-Lin(马海林)^a)†, Fan Duo-Wang(范多旺)^a), and Niu Xiao-Shan(牛晓山)^b)

^a National Engineering Research Center of Green Coating Technology and Equipment, Lanzhou Jiaotong University, Lanzhou 730070, China; ^b Lanzhou Dacheng Vacuum Technology Co. Ltd., Lanzhou 730070, China

Received:2009-11-19 Online:2010-07-15 Published:2010-07-15

摘要/Abstract

摘要： Monoclinic gallium oxide (β-Ga₂O₃) nanobelts are synthesized from gallium and oxygen by thermal evaporation in an argon atmosphere and their NO₂ sensing properties are studied at room temperature. Electron microscopy studies show that the nanobelts have breadths ranging from 30 to 50 nm and lengths up to tens of micrometers. Both the x-ray diffraction (XRD) and the selected are electron diffraction (SAED) examinations indicate that β-Ga₂O₃ nanobelts have grown into single crystals. Room temperature NO₂ sensing tests show that the current of individual β-Ga₂O₃ nanobelt decreases quickly, and then gently when the NO₂ concentration increases from low to high. It is caused by the NO₂ molecule chemisorption and desorption processes in the surface of β-Ga₂O₃ nanobelt.

Abstract: Monoclinic gallium oxide (β-Ga₂O₃) nanobelts are synthesized from gallium and oxygen by thermal evaporation in an argon atmosphere and their NO₂ sensing properties are studied at room temperature. Electron microscopy studies show that the nanobelts have breadths ranging from 30 to 50 nm and lengths up to tens of micrometers. Both the x-ray diffraction (XRD) and the selected are electron diffraction (SAED) examinations indicate that β-Ga₂O₃ nanobelts have grown into single crystals. Room temperature NO₂ sensing tests show that the current of individual β-Ga₂O₃ nanobelt decreases quickly, and then gently when the NO₂ concentration increases from low to high. It is caused by the NO₂ molecule chemisorption and desorption processes in the surface of β-Ga₂O₃ nanobelt.

Key words: gallium oxide, sensors, nanobelts, NO₂

中图分类号: (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)

07.07.Df

81.16.-c (Methods of micro- and nanofabrication and processing) 68.43.Mn (Adsorption kinetics ?)

马海林, 范多旺, 牛晓山. Preparation and NO₂-gas sensing property of individual β-Ga₂O₃ nanobelt[J]. 中国物理B, 2010, 19(7): 76102-076102.

Ma Hai-Lin(马海林), Fan Duo-Wang(范多旺), and Niu Xiao-Shan(牛晓山). Preparation and NO₂-gas sensing property of individual β-Ga₂O₃ nanobelt[J]. Chin. Phys. B, 2010, 19(7): 76102-076102.

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Preparation and NO₂-gas sensing property of individual β-Ga₂O₃ nanobelt

Preparation and NO₂-gas sensing property of individual β-Ga₂O₃ nanobelt

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