Highly sensitive formaldehyde resistive sensor based on a single Er-doped SnO2 nanobelt

作者：Li, Shuanghui; Liu, Yingkai^*; Wu, Yuemei; Chen, Weiwu; Qin, Zhaojun; Gong, Nailiang; Yu, Dapeng

来源：Physica B: Condensed Matter , 2016, 489: 33-38.

DOI：10.1016/j.physb.2016.02.021

• Thermal evaporation
• SnO2 nanobelts
• Er3+ doping
• Gas sensor

SnO2 nanobelts (SnO2 NBs) and Era(3+)-doped SnO2 nanobelts (Er-SnO2 NBs) were synthesized by thermal evaporation. The obtained samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersion spectrometer (EDS), and X-ray photoelectron spectrometer (XPS). It is found that Er-SnO2 NBs have a good morphology with smooth surface and their thickness are about 30 nm, widths between 200 nm and 600 nm, and lengths 30-80 mm. The nanobelts with good morphology were taken to develop sensors based on a single Er-SnO2 NB/SnO2 NB for studying sensitive properties. The results reveal that the response of a single Er-SnO2 nanobelt device is 9 to the formaldehyde gas with a shorter response (recovery time) of 17 (25) s.

• 出版日期2016-5-15
• 单位北京大学; 云南师范大学