標題: | Hydrogen Gas Sensors Using ZnO-SnO2 Core-Shell Nanostructure |
作者: | Yao, I-Chuan Lin, Pang Tseng, Tseung-Yuen 材料科學與工程學系 電子工程學系及電子研究所 Department of Materials Science and Engineering Department of Electronics Engineering and Institute of Electronics |
公開日期: | 1-十二月-2010 |
摘要: | The fabrication and electrical properties of H-2 gas sensor with ZnO-SnO2 core shell nanostructure were studied. The ZnO-SnO2 core shell nanowires were synthesized through a novel two-step chemical growth. The structure, morphology and composition of the nanowires were investigated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDS) and X-ray photoelectron spectrometer (XPS), respectively. The experimental results showed that the amorphous SnO2 was uniformly coated onto the entire ZnO single crystal nanowire to form ZnO-SnO2 core shell nanostructure. The electrical properties of the core shell nanowires in 25-200 ppm of hydrogen (H2) were measured at temperature of 250 C. It was found that the ZnO-SnO2 core shell nanowires exhibited excellent hydrogen sensor performance, such as the sensitivity is up to 89% against 200 ppm hydrogen. Such high sensitivity was believed to be controlled by the nanoscale SnO2 layer, which was determined from pinch-off and fully conductive state. The ZnO SnO2 core shell nanostructures made by two-step chemical growth have high potential for gas sensor application. |
URI: | http://dx.doi.org/10.1166/asl.2010.1190 http://hdl.handle.net/11536/150036 |
ISSN: | 1936-6612 |
DOI: | 10.1166/asl.2010.1190 |
期刊: | ADVANCED SCIENCE LETTERS |
Volume: | 3 |
起始頁: | 548 |
結束頁: | 553 |
顯示於類別: | 期刊論文 |