Unusual spectroscopic properties of PPE/TiO2 composite and its sensor response to TNT

Deng, Changmin, He, Qingguo, Cheng, Jiangong, Zhu, Defeng, He, Chao and Lin, Tong 2009, Unusual spectroscopic properties of PPE/TiO2 composite and its sensor response to TNT, Synthetic metals, vol. 159, no. 3-4, pp. 320-324.

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Title Unusual spectroscopic properties of PPE/TiO2 composite and its sensor response to TNT
Author(s) Deng, Changmin
He, Qingguo
Cheng, Jiangong
Zhu, Defeng
He, Chao
Lin, Tong
Journal name Synthetic metals
Volume number 159
Issue number 3-4
Start page 320
End page 324
Total pages 5
Publisher Elsevier S.A.
Place of publication Lausanne, Switzerland
Publication date 2009-02
ISSN 0379-6779
Summary A composite from a broad bandgap polymer, poly(phenylene ethylene) (PPE), and nano-sized TiO2 particles was found to be able to sense 2,4,6-trinitrotoluene (TNT) for TNT sensor. Fluorescence quenching induced by charge transfer from PPE to nano-sized TiO2 was observed in toluene solution. At high TiO2 composition, a strong exciplex band occurred at 550 nm. Under prolonged light irradiation at 400 nm, unusual fluorescence gains took place at 460 nm, companied with a very small change in the UV–vis absorbance. After 30 min light irradiation, the fluorescence at 460 nm reached a maximum, but the peak at 550 nm disappeared. This composite showed amplified sensor response to TNT compared to the pristine PPE film, which can be potentially used as sensing material for detecting TNT based explosives.
Language eng
Field of Research 091202 Composite and Hybrid Materials
Socio Economic Objective 869999 Manufacturing not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2008, Elsevier B.V.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30026182

Document type: Journal Article
Collection: Centre for Material and Fibre Innovation
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