| Autor: |
Suvit Thanasanvorakun, Nikorn Mangkorntong, Duangmanee Wongratanaphisan, Pongsri Mangkorntong, Supab Choopun, Surachet Phadungdhitidhada |
| Rok vydání: |
2011 |
| Předmět: |
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| Zdroj: |
Current Applied Physics. 11:1368-1373 |
| ISSN: |
1567-1739 |
| Popis: |
Mixed morphology of SnO 2 nanowires and nanodendrites was synthesized on the gold-coated alumina substrates by carbothermal reduction of SnO 2 in closed crucible. The products were characterized by scanning electron microscopy, x-ray diffractometer, and transmission electron microscopy. Results showed the SnO 2 nanowires and the SnO 2 nanodendrites branched out from the main nanowires. Both SnO 2 nanostructures were pure tetragonal rutile structure. The nanowires were grown in [101] and [ 1 2 ¯ 1 ¯ ] directions with the diameter of 50–150 nm and the length of a few 10 μm. The nanodendrites were about 100–300 nm in diameter. The growth mechanism of the SnO 2 nanostructures was also discussed. Characterization of ethanol gas sensor, based on the mixed morphology of the SnO 2 nanostructures, was carried out. The optimal temperature was about 360 °C and the sensor response was 120 for 1000 ppm of ethanol concentration. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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