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The Analysis of NOx Gas Detection Characteristics for the Gas Sensor Using the MWCNT/ZnO Composites Film
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 Title & Authors
The Analysis of NOx Gas Detection Characteristics for the Gas Sensor Using the MWCNT/ZnO Composites Film
Kim, Hyun-Soo; Lee, Won-Jae; Park, Yong-Seo; Jang, Kyung-Uk;
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In this study, we fabricated gas sensor by using multi-walled carbon nanotubes(MWCNT)/zinc oxide(ZnO) composite film. Carbon nanotubes (CNTs) have good electronic, chemical-stability, and sensitivity characteristics. And zinc oxide (ZnO) is a wide band gap and large exciton binding energy semiconductor. In particular, gas sensors require characteristics such as high speed, sensitivity, and selectivity. The fabricated gas sensor was used to detect gas for different values of the gas concentrations. The gas sensor that absorbed gas molecules showed a increasing in resistance. The sensitivity of the gas sensor was increased by increasing the gas concentrations. Additionally, while changing the temperature inside the chamber for the MWCNT/ZnO composite film gas sensor, we obtained the sensitivity. And the comparison analysis to ZnO film gas sensor for detecting gas. From the experiment result, we confirmed improvement of gas detection characteristics using the MWCNT/ZnO composite film.
Multi-walled carbon nanotube;Zinc oxide;MWCNT/ZnO composite film gas sensor;Sensitivity; gas;
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