Fabrication and ethanol-sensing properties of micro gas sensor based on electrospun SnO2 nanofibers

Abstract SnO 2 nanofibers were obtained by electrospinning of a poly(vinyl alcohol) (PVA)/SnCl 4 ·5H 2 O solution. A novel micro gas sensor based on the SnO 2 nanofibers was successfully fabricated. The morphology and crystal structure of the fibers were analyzed by scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD), and the ethanol-sensing properties of the sensor were tested. The results showed that the SnO 2 nanofibers with an average diameter of ∼100 nm could be directly deposited on a microhotplate by “near-field” electrospinning. The micro gas sensor exhibited large response, low detection limit, fast response/recovery and good reproducibility. The detection limit was

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