Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/77238
Title: The fabrication and evaluation of a vapour sensor based on quartz crystal microbalance coated with poly(o-anisidine) Langmuir-Blodgett layers
Authors: Chen, Z.-K. 
Ng, S.-C. 
Li, S.F.Y. 
Zhong, L.
Xu, L.
Chan, H.S.O. 
Keywords: Langmuir-Blodgett films
Organic vapours
Poly(o-anisidine)
Quartz crystal microbalance
Sensors
Issue Date: 15-Apr-1997
Source: Chen, Z.-K.,Ng, S.-C.,Li, S.F.Y.,Zhong, L.,Xu, L.,Chan, H.S.O. (1997-04-15). The fabrication and evaluation of a vapour sensor based on quartz crystal microbalance coated with poly(o-anisidine) Langmuir-Blodgett layers. Synthetic Metals 87 (3) : 201-204. ScholarBank@NUS Repository.
Abstract: Chemical sensors based on Langmuir-Blodgett (LB) films of poly(o-anisidine) (POA) have been investigated. POA, synthesized by chemical oxidation and mixed with stearic acid, was successfully transferred onto quartz crystal microbalance (QCM) sensors using the LB film technique and used as the active sensing material. The resulting QCM sensor can selectively detect and distinguish among fatty acid vapours such as formic acid, acetic acid, propionic acid and butyric acid. The results suggest that the response of QCM sensors to fatty acids is dependent on both molecular weight and steric hindrance factors. Moreover, the sensitivity of the QCM sensors to different types of organic vapours increases linearly with the number of LB monolayers coated, with a concurrent loss of selectivity.
Source Title: Synthetic Metals
URI: http://scholarbank.nus.edu.sg/handle/10635/77238
ISSN: 03796779
Appears in Collections:Staff Publications

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