Electrochemically Decorated ZnTe Nanodots on Single-Walled Carbon Nanotubes for Room-Temperature NO2 Sensor Application
- Title
- Electrochemically Decorated ZnTe Nanodots on Single-Walled Carbon Nanotubes for Room-Temperature NO2 Sensor Application
- Author
- 유봉영
- Keywords
- Carbon Nanotube; Sensor; NO2 Gas; ZnTe Nanodots; Electrodeposition
- Issue Date
- 2014-11
- Publisher
- American Scientific Publishers
- Citation
- Journal of Nanoscience and Nanotechnology, v. 14, NO. 11, Page. 8248-8252
- Abstract
- A gas sensor with ZnTe nanodot-modified single-walled carbon nanotubes (SWCNTs) is demonstrated for NO2 detection at room temperature. ZnTe nanodots are electrochemically deposited in an aqueous solution containing ZnSO4, TeO2 and citrate. A deposition potential range of ZnTe formation of -0.65 to -0.9 V is determined by cyclic voltammetry, and an intermetallic ZnTe compound is formed at above 50 degrees C bath. SWCNT-based sensors show the highly sensitive response down to 1 ppm NO2 gas at room temperature. In particular, the sensitivity of ZnTe nanodot-modified SWCNTs is increased by 6 times as compared to that of pristine SWCNT sensors. A selectivity test of SWCNT-ZnTe nanodots sensors is carried out with ammonia gas (NH3) and methanol vapor (MeOH), and the result confirms an excellent selectivity to NO2 gas.
- URI
- https://www.ingentaconnect.com/content/asp/jnn/2014/00000014/00000011/art00025https://repository.hanyang.ac.kr/handle/20.500.11754/180939
- ISSN
- 1533-4880;1533-4899
- DOI
- 10.1166/jnn.2014.9901
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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