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

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• 作者：Shuanghui Li^a ; ^b ; ^c ; ^{lishuanghui808@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yingkai Liu^a ; ^b ; ^c ; ^{liuyingkai99@163.com" class="auth_mail" title="E-mail the corresponding author} ; Yuemei Wu^a ; ^b ; ^c ; ^{wuyuemei893@163.com" class="auth_mail" title="E-mail the corresponding author} ; Weiwu Chen^a ; ^b ; ^c ; ^{chenweiwu55@163.com" class="auth_mail" title="E-mail the corresponding author} ; Zhaojun Qin^a ; ^b ; ^c ; ^{qinzhaojun031@163.com" class="auth_mail" title="E-mail the corresponding author} ; Nailiang Gong^a ; ^b ; ^c ; ^{qinzhaojun031@163.com" class="auth_mail" title="E-mail the corresponding author} ; Dapeng Yu^c ; ^d ; ^{gongnailiang@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Thermal evaporation ; SnO2 nanobelts ; Er3+ doping ; Gas sensor
• 刊名：Physica B: Physics of Condensed Matter
• 出版年：2016
• 出版时间：15 May 2016
• 年：2016
• 卷：489
• 期：Complete
• 页码：33-38
• 全文大小：2041 K

文摘

SnO₂ nanobelts (SnO₂ NBs) and Er³⁺-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.