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Issue 26, 2007
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Fluorescent nanofibrous membranes for trace detection of TNT vapor

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Abstract

Electrospinning is a simple and cost-effective approach for the production of nanofibers and assemblies with controllable structures. In this work, based on sol–gel chemistry and the electrospinning technique, porphyrin-doped nanocomposite fibers with a form of nanofibrous membrane were successfully fabricated without the addition or help of polymers, and were demonstrated as novel fluorescence-based chemosensors for the rapid detection of trace vapor (10 ppb) of explosive. Due to a larger surface area and good gas permeability, these fluorescent nanofibrous membranes exhibit remarkable sensitivity to trace TNT vapor compared to tightly cross-linked silica films, but their sensitivity is strongly dependent upon the morphology and phase aggregation of the used nanofibers. Reducing the diameter and introducing a pore structure into nanofibers can considerably enhance the sensitivity of the resulting materials. The performed experiments suggest that the hierarchically structured, porphyrin-doped nanofibrous membranes are potentially very useful chemosensory materials for detecting trace explosives.

Graphical abstract: Fluorescent nanofibrous membranes for trace detection of TNT vapor

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Publication details

The article was received on 12 Dec 2006, accepted on 13 Apr 2007 and first published on 25 Apr 2007


Article type: Paper
DOI: 10.1039/B618122H
Citation: J. Mater. Chem., 2007,17, 2730-2736
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    Fluorescent nanofibrous membranes for trace detection of TNT vapor

    S. Tao, G. Li and J. Yin, J. Mater. Chem., 2007, 17, 2730
    DOI: 10.1039/B618122H

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