상세정보
학술지
Additional Thermodynamic Feature Extraction from Chemoresistive Carbon Black-polymer Composite Sensors by Temperature Modulation
- 저자
- 김용신, 양윤석
- 발행일
- 200702
- 출처
- Sensors and Actuators B : Chemical, v.121 no.2, pp.507-514
- ISSN
- 0925-4005
- 출판사
- Elsevier
- 협약과제
- 05MB3500, e-Health 구현을 위한 바이오 센서 기술 개발, 최창억
- 초록
- Chemoresistive responses of four different carbon black-polymer composite sensors were measured with varying a sensor temperature upon exposure to volatile organic compounds (VOCs). A new thermodynamic response was extracted from the temperature dependence of the chemoresistive responses. The thermodynamic parameter was determined by the standard enthalpy energy change during the sensing processes. It mainly reflected non-specific physical interactions between the composite materials and the analyte vapors rather than analyte-specific interactions. In order to prove its capability as a feature parameter in pattern recognition programs, principal component analyses were performed by using both the chemoresistive and the thermodynamic responses simultaneously. The resultant outcome clearly demonstrated that the use of the additional thermodynamic feature improved the classification capability between VOC classes due to the correction of the deteriorations originated from the temperature-dependent response variations. © 2006 Elsevier B.V. All rights reserved.
- KSP 제안 키워드
- Carbon black-polymer composite, Composite materials, Energy change, Feature extractioN, Feature parameter, Pattern recognition, Physical interaction, Principal Component, Specific interactions, Standard enthalpy, Temperature-dependent