상세정보
학술지
Fast Response Formaldehyde Gas Sensor for USN Application
- 발행일
- 201212
- 출처
- Sensors and Actuators B : Chemical, v.175, pp.132-136
- ISSN
- 0925-4005
- 출판사
- Elsevier
- 협약과제
- 12MB2400, 스마트&그린 빌딩용 자가충전 지능형 센서노드 플랫폼 핵심기술 개발, 김종대
- 초록
- Semiconductor type gas sensors based on aluminum-doped zinc oxide with less than 50 nm particle size were fabricated on Si substrate to detect formaldehyde (HCHO) gas existing in building. It is very toxic and pollutant in air and especially, very dangerous for infants and kids. The prepared materials were very fine and uniform and we found out that crystallite sizes were about 10-25 nm through X-ray diffraction analysis and scanning electron microscopy. Gas response characteristics were examined for HCHO gas. In particular, the sensors showed responses to formaldehyde gas at sub ppm (cf, standard of natural environment in building is about 80 ppb), as a function of operating temperatures and gas concentrations. The lowest detection limit is HCHO 25 ppb and response of 800 ppb is about 60% at 350°C operating temperature. The response time of 8 s to HCHO gas is very fast compared to other commercial products in flow type measurement condition. Repetition measurement was very good with 짹 2% in full measurement range. © 2012 Elsevier B.V.
- KSP 제안 키워드
- 5 nm, Aluminum-doped zinc oxide, Commercial products, Crystallite size, Detection limit, Flow type, Formaldehyde gas sensor, Gas response, Measurement condition, Measurement range, Natural environment