A facile thermal evaporation route for large-area synthesis of tin oxide nanowires: Characterizations and their use for liquid petroleum gas sensor

作者：Hieu Nguyen Van^*; Loan Le Thi Ngoc; Khoang Nguyen Duc; Minh Nguyen Tuan; Viet Do Thanh; Minh Do Cong; Trung Tran; Chien Nguyen Duc

来源：Current Applied Physics, 2010, 10(2): 636-641.

DOI：10.1016/j.cap.2009.08.008

• Nanowires
• Tin oxide
• Gas sensor

In this paper, a very simple procedure was presented for the reproducible synthesis of large-area SnO(2) nanowires (NWs) on a silicon substrate by evaporating Sri powders at temperatures of 700, 750, and 800 degrees C. As-obtained SnO(2) NWs were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman spectroscopy. They revealed that the morphology of the NWs is affected by growth temperature and the SnO(2) NWs are single-crystalline tetragonal. The band gap of the NWs is in the range of 4.2-4.3 eV as determined from UV/visible absorption. The NWs show stable photoluminescence with an emission peak centered at around 620 nm at room-temperature. The sensors fabricated from the SnO(2) NWs synthesized at 700 degrees C exhibited good response to LPG (liquefied petroleum gas) at an operating temperature of 400 degrees C.

• 出版日期2010-3