| 학회 |
한국재료학회 |
| 학술대회 |
2016년 봄 (05/18 ~ 05/20, 여수 디오션리조트 ) |
| 권호 |
22권 1호 |
| 발표분야 |
G. 나노/박막 재료 분과 |
| 제목 |
Morphology-Controlled ZnO Nanostructures for the Highly Sensitive Gas Sensors |
| 초록 |
Highly sensitive gas sensors were fabricated by drop-casting the solutions of various ZnO nanostructures onto the substrate with a heater pattern. The twinned and flower-shaped hexagonal ZnO nanorods were synthesized in a solution of zinc nitrate and hexamethylenetetramine using a chemical bath deposition method, while well-developed hexagonal nanorods, uniform conical nanorods, and nanoplatelets were prepared by a low-temperature aqueous solution method with the support of ethylenediamine. The gas-sensing properties of the ZnO nanostructures were analyzed for NH3 and NO2 gases at an elevated temperature of 400 oC. The resistance of the gas sensor increased in the presence of NO2, whereas it decreased in response to NH3, proving its gas-selectivity. All the gas sensors from ZnO nanostructures showed rapid and clear responses to both gases even at a low concentration of 5 ppm. ZnO nanotwins and nanoflowers exhibited very high sensitivities of hundreds to thousands per cent, particularly to NO2. The effects of the morphology of ZnO nanostructure on its gas-sensing performance were carefully studied. |
| 저자 |
Nguyen Thanh Son1, Shao-Lin Zhang2, 양우철2, 노진서1
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| 소속 |
1가천대, 2동국대 |
| 키워드 |
ZnO nanorods; ZnO nanostructures; gas sensor; sensitivity; chemical bath deposition; solution method
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| E-Mail |
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