Study of Pore Property of Mesoporous Films Materials for Trace Explosive Detection

Abstract:

Thus, here, by using the sol-gel technique and spin coating technology, a series of mesoporous silica thin films doped by silylated naphthol fluorescence dye were successfully fabricated. By selecting the same surfactant triblock copolymer Pluronic F127 (EO₁₀₆-PO₇₀-EO₁₀₆) as structure-directing agent, films with different pore structure and similar aperture size were synthesized under different conditions. The films doping fluorescence dye toward nitro explosive 2, 4, 6-trinitrotoluene (TNT) vapor exhibited rapid response rate and extremely high fluorescent quenching efficiency, close to 96.4 % after 1200 s response. The results clearly showed that pore structure control of mesoporous film was an effective way to improve sensor performance. Mesoporous thin films, with different pore structure, easily to be prepared and owning high sensitivity, could be used as a new alternative of trace explosive detecting material.

• Periodical: Materials Science Forum (Volumes 743-744)
• Pages: 397-401
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.743-744.397
• Online since: January 2013
• Authors: Li Ma, Yu Quan Wen, Nan Yan, Guang Tao Li
• Keywords: Fluorescent Spectra, Mesoporous Silica Film, Porosity, Trace Explosive Detection

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