Preparation and NO_2-gas sensing property of individual β-Ga_2O_3 nanobelt |
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引用本文: | 马海林,范多旺,牛晓山.Preparation and NO_2-gas sensing property of individual β-Ga_2O_3 nanobelt[J].中国物理 B,2010,19(7):76102-076102. |
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作者姓名: | 马海林 范多旺 牛晓山 |
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作者单位: | (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 |
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摘 要: | Monoclinic gallium oxide (β-Ga_2O_3) nanobelts are synthesized from gallium and oxygen by thermal evaporation in an argon atmosphere and their NO_2 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-Ga_2O_3 nanobelts have grown into single crystals.Room temperature NO_2 sensing tests show that the current of individual β-Ga_2O_3 nanobelt decreases quickly,and then gently when the NO_2 concentration increases from low to high.It is caused by the NO_2 molecule chemisorption and desorption processes in the surface of β-Ga_2O_3 nanobelt.
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关 键 词: | gallium oxide sensors nanobelts NO2 |
收稿时间: | 2009-11-19 |
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