Template-directed synthesis of silica nanotubes for explosive detection

Date
2011
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Source Title
ACS Applied Materials and Interfaces
Print ISSN
1944-8244
Electronic ISSN
1944-8252
Publisher
American Chemical Society
Volume
3
Issue
10
Pages
4159 - 4164
Language
English
Type
Article
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Abstract

Fluorescent porous organic-inorganic thin films are of interest of explosive detection because of their vapor phase fluorescence quenching property. In this work, we synthesized fluorescent silica nanotubes using a biomineralization process through self-assembled peptidic nanostructures. We designed and synthesized an amyloid-like peptide self-assembling into nanofibers to be used as a template for silica nanotube formation. The amine groups on the peptide nanofibrous system were used for nucleation of silica nanostructures. Silica nanotubes were used to prepare highly porous surfaces, and they were doped with a fluorescent dye by physical adsorption for explosive sensing. These porous surfaces exhibited fast, sensitive, and highly selective fluorescence quenching against nitro-explosive vapors. The materials developed in this work have vast potential in sensing applications due to enhanced surface area. © 2011 American Chemical Society.

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Keywords
Biomimetic, Peptide, Template-directed synthesis, Self-assembly, Silica, Explosive detection
Citation
Published Version (Please cite this version)