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  • 09월 06일 15시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제112회 대한화학회 학술발표회, 총회 및 기기전시회 안내 New gas sensor using 3-D Single-Walled Carbon Nanotubes network suspened on ZnO Nanorods

2013년 8월 29일 16시 57분 53초
PHYS.P-405 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 16일 (수요일) 16:00~19:00
저자 및
이준영, 신호경, 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 fabricated a gas ionization sensor based on 3-dimensional (3D) single-walled carbon nanotube (SWNT) networks suspended between ZnO nanorods by using a chemical vapor deposition method. ZnO nanorods were grown on the pyramid-like protrusions of a textured Si substrate. The breakdown voltages and stability of the 3D SWNT networks were measured and compared to those of a SWNT film synthesized on Si substrate. Our results show that 3D SWNT networks on ZnO nanorods enable ionization gas sensors to be sensitive, selective, and highly stable devices.