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Li S.,Key Laboratory of Yunnan Higher Education Institutes for Optoelectric Information and Technology | Li S.,Key Laboratory of Photoelectric Materials and Device | Li S.,Yunnan Normal University | Liu Y.,Key Laboratory of Yunnan Higher Education Institutes for Optoelectric Information and Technology | And 16 more authors.
Physica B: Condensed Matter | Year: 2016

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. © 2016 Elsevier B.V. All rights reserved.

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