Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 145, Issue 1, Pages 438-443Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.12.056
Keywords
Conjugated polymer; Silica nanoparticle; TNT; Fluorescent chemosensor
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Conjugated polymer-grafted silica nanoparticles were prepared by Sonogashira coupling reaction involving a two-step procedure. The resulting conjugated polymer-grafted silica nanoparticles were characterized by infrared spectroscopy, thermogravimetric analysis, transmission electron microscopy, and absorption and fluorescence spectroscopy. The conjugated polymer-grafted silica nanoparticles are highly fluorescent, and the fluorescent response of the nanoparticles of different size towards electron-deficient trinitrotoluene (TNT) was studied by examining how the steady state fluorescence intensity changes with the concentration of TNT. The conjugated polymer-grafted silica nanoparticles show high sensitivity toward TNT, with a detection limit down to 1 mu M. 2009 Elsevier B.V. All rights reserved.
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