In this work, a large quantity of ZnO, SnO₂ and WO₃ nanowires (NWs) was successfully synthesised by simple and efficient methods. Their morphology and microstructure were characterised by FE-SEM, TEM, XRD, PL, and Raman. The NH₃ gas-sensing properties of these NWs were investigated and compared. It was found that the responses and response-recovery time of SnO₂ and WO₃ NWs sensors to NH₃ gas are relatively comparable, and they have a better NH₃ gas-sensing performance than that of ZnO NWs sensor. In addition, the SnO₂ NWs sensor has the lowest operating temperature. Copyright © 2011 Inderscience Enterprises Ltd.

Hieu N.V., Le D.T.T., Khoang N.D., Quy N.V., Hoa N.D., Tam P.D., Le A.-T., Trung T.

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