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Citation: ZHENG Kai-Bo, LI Jing-Lei, SHEN Hao-Ting, SUN Da-Lin, CHEN Guo-Rong. Gas Sensing Properties of Single ZnO Nanowire at Room Temperature[J]. Acta Physico-Chimica Sinica, ;2008, 24(06): 1080-1084. doi: 10.3866/PKU.WHXB20080629 shu

Gas Sensing Properties of Single ZnO Nanowire at Room Temperature

1.
Department of Materials Science, Fudan University, Shanghai 200433, P. R. China

Received Date: 12 December 2007
Available Online: 21 April 2008

ZnO nanowires with (002) oriented direction was synthesized via modified CVD method. Bottom-up assembly including photolithography/lift off was employed to fabricate gas sensor based on single ZnO nanwire with 50-300 nm in diameter and 2-10 μm in length. The as-prepared device showed gas sensitivities of 1.3 and 1.2 to oxygen and ethanol gases with concentration of 500 μL·L-1 at room temperature, and the corresponding temporal responses were 10 and 5 s, respectively. The improved gas sensing properties were attributed to the enhancement of the current-induced heating on the quasi-one-dimensional nanostructure.
- ZnO; Nanowire; Gas sensor
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