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Evaluation of the limit-of-detection capability of carbon black-polymer composite sensors for volatile breath biomarkers

Authors
Kang, Nae KyoungJun, Tae SunLa, Duc-DuongOh, Je HoonCho, Yong WooKim, Yong Shin
Issue Date
May-2010
Publisher
Elsevier BV
Keywords
Carbon black-polymer composite; Gas sensor; Limit-of-detection; Electronic nose system
Citation
Sensors and Actuators, B: Chemical, v.147, no.1, pp.55 - 60
Indexed
SCIE
SCOPUS
Journal Title
Sensors and Actuators, B: Chemical
Volume
147
Number
1
Start Page
55
End Page
60
URI
https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/39793
DOI
10.1016/j.snb.2010.03.025
ISSN
0925-4005
Abstract
Six composite sensors were prepared by casting a solution of different polymers and conductive carbon black nanoparticles on a glass substrate with two comb-shape Au electrodes. The chemoresistive response and background noise level were measured as a function of concentration upon exposure to various breath biomarker compounds: acetic acid, toluene, ethanol, acetone, n-pentane, and isoprene. All sensors exhibited a good linear response with respect to concentration, suggesting a typical volumetric transduction mechanism. Limit-of-detection (LOD) values were determined by an extrapolation of the linear relationship and were found to be in the range of 80 ppb to 240 ppm, demonstrating the potential of highly sensitive detection for the biomarkers. The LOD variation can be roughly interpreted in terms of the difference in boiling temperature of an analyte in a physisorption-based model; the higher boiling temperature results in a lower LOD due to a strong tendency toward condensation. The LOD values were observed to become two or three orders of magnitude smaller by exploiting specific chemical interactions between the polymers used and the analyte. (c) 2010 Elsevier B.V. All rights reserved.
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COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY > DEPARTMENT OF CHEMICAL AND MOLECULAR ENGINEERING > 1. Journal Articles
COLLEGE OF ENGINEERING SCIENCES > DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING > 1. Journal Articles
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