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Deposition of Tin Oxide Nanofibers on a Microhotplate by a Controlled Electrospinning

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Abstract:

Electrospun fibers have been applied to micro- and nano-devices, in which the controllability of the electrospinning area is critical. The current work is focused on depositing tin oxide nanofibers on a microhotplate. It demonstrates the feasibility of dampening the instability and decreasing the deposition area through the use of an auxiliary cylindrical electrode and a "near-field" technique. The micro gas sensor based on SnO2 nanofibers is successfully fabricated by electrospinning poly (vinyl alcohol) (PVA)/SnCl4ยท5H2O composite and proper annealing. The results of acetone vapor detection show that the sensor has a high sensitivity, a low detection limit (<10 ppb), and a fast response/recovery.

Keywords: CYLINDRICAL ELECTRODE; ELECTROSPINNING; MICRO GAS SENSOR; NEAR-FIELD

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/sl.2008.539

Publication date: December 1, 2008

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