A comparative study on the NH3 gas-sensing properties of ZnO, SnO2, and WO3 nanowires. (24th January 2011)

• Record Type: Journal Article
• Authors: Hieu, Nguyen Van; Le, Dang Thi Thanh; Khoang, Nguyen Duc; Quy, Nguyen Van; Hoa, Nguyen; Tam, Phuong; Le, Anh-Tuan; Trung, Tran
• Is Part Of: International journal of nanotechnology. Volume 8:Number 3/4/5(2011)
• Page Start: 174
• Page End: 187
• Publication Date: 2011-01-24
• Subjects: NWs -- nanowires -- gas sensors -- zinc oxide -- tin oxide -- tungsten oxide -- nanotechnology -- morphology -- microstructure -- temperature -- sensing performance; 620.505
• Languages: English
• ISSNs: 1475-7435

Abstract

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.