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Enhanced Gas Sensing Properties of Aligned Porous SnO2 Nanofibers |
| ZHAO Yan, HE Xiu-Li**, LI Jian-Ping, JIA Jian, GAO Xiao-Guang |
| State Key Laboratory of Transducer Technology, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190 |
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ZHAO Yan, HE Xiu-Li, LI Jian-Ping et al 2012 Chin. Phys. Lett. 29 070701 |
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Abstract Aligned porous SnO2 nanofibers are obtained by electrospinning with the collector of parallel wedge-shaped electrodes and then by oxygen plasma treatment and annealing. The morphology and crystal structure of the fibers are analyzed by scanning electron microscopy and x-ray diffraction, and the effects of the morphology and alignment on ethanol sensing properties of the fibers are investigated. The results show that the porous SnO2 fibers with an average diameter of tens of nanometers can be deposited orderly on the micro-hotplate with the auxiliary electrodes. The aligned porous fibers exhibit higher sensitivity and faster response compared with randomly oriented ones at the operating temperature of 300°C.
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Received: 31 December 2011
Published: 29 July 2012
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| PACS: |
07.07.Df
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(Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)
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81.16.-c
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(Methods of micro- and nanofabrication and processing)
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81.07.-b
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(Nanoscale materials and structures: fabrication and characterization)
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