Abstract
The direct synthesis of tin dioxide (SnO2) nanowire arrays on a glass substrate by using an ultrasonic spray pyrolysis method combined with sintering is demonstrated. The products obtained are characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM) and high-resolution TEM. The results show that the SnO2 nanowire arrays consist of single crystalline nanowires, each with a diameter of 50-70 nm and a length of 5-7 μm. There are two different nanowire growth directions because of the oxygen defect growth. The mechanism of the formation and growth of SnO2 nanowire arrays was investigated. A platform gas sensor based on these arrays was fabricated. The sensor exhibits better sensitivity to and selectivity for NO2 than do SnO2 nanoparticles. The gas sensing mechanism is also discussed.
Originalsprog | Engelsk |
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Tidsskrift | RSC Advances |
Vol/bind | 4 |
Udgave nummer | 82 |
Sider (fra-til) | 43429-43435 |
Antal sider | 7 |
ISSN | 2046-2069 |
DOI | |
Status | Udgivet - 2014 |
Udgivet eksternt | Ja |
Bibliografisk note
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