| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1443626 | Synthetic Metals | 2009 | 5 Pages |
Abstract
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 550Â nm. Under prolonged light irradiation at 400Â nm, unusual fluorescence gains took place at 460Â nm, companied with a very small change in the UV-vis absorbance. After 30Â min light irradiation, the fluorescence at 460Â nm reached a maximum, but the peak at 550Â 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.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Biomaterials
Authors
Changmin Deng, Qingguo He, Jiangong Cheng, Defeng Zhu, Chao He, Tong Lin,