Functionalized mesoporous silica for microgravimetric sensing of trace chemical vapors.

@article{Xu2011FunctionalizedMS,
  title={Functionalized mesoporous silica for microgravimetric sensing of trace chemical vapors.},
  author={Pengcheng Xu and Haitao Yu and Xinxin Li},
  journal={Analytical chemistry},
  year={2011},
  volume={83 9},
  pages={3448-54}
}
Featuring a huge surface-to-volume ratio, synthesized SBA-15 mesoporous silica is functionalized by inner-channel-wall modification of sensing groups for highly specific chemical-vapor detection at trace level. With the developed sensing material loaded on resonant microcantilevers, the specifically adsorbed chemical-vapor molecules act as an added mass to shift the cantilever resonant frequency for gravimetric sensing signal readout. Two kinds of sensing materials for trinitrotoluene (TNT) and… CONTINUE READING
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