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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Gas ionization sensor based on 3-D Single-Walled Carbon Nanotubes network synthesized on ZnO Nanorods

2012년 2월 22일 15시 38분 17초
PHYS.P-503 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 25일 (수요일) 18:00~21:00
저자 및
이종택, 김희수, 이휘건
한양대학교 화학과, Korea
Gas sensors can be classified into a chemical type operated by gas adsorption and a physical type operated by ionization. The chemical types of gas sensor usually utilize an electrical response by the adsorption of gas molecules on the surface of the active layer, which leads to a large change in its electrical resistance. But most of these sensors (except for the CNTs-based sensors) need high working temperatures, for example 300?500℃. Meanwhile, structures with large surface area may be required for distinguishable detection, which cause problems like high power consumption and pre-heating time. On the other hand, ionization sensors as a physical type gas sensor work by fingerprinting the ionization characteristics of distinct gases. However, this kind of instrument has high power consumption and risky high-voltage operation, and thus cannot be used on site. In this experiment, we synthesize single-walled carbon nanotubes (SWNTs) on zinc oxide (ZnO) nanorods on textured Si substrate using thermal chemical vapor deposition (CVD). By synthesizing SWNTs on ZnO nanorods, the suspended SWNTs formed on ZnO nanorods can create 3-dim networks structure. After that we fabricate gas ionization sensor using 3-D SWMTs as anode and measure breakdown voltage of gas sensor and degree of stability compared to those of SWNTs film on textured Si. From that result, we confirm that gas ionization sensor using 3-D SWMTs has a better performance than SWNTs film and shows a possibility as practical gas sensor.