Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 405, Issue -, Pages 16-20Publisher
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2014.08.033
Keywords
Aerogel; Sol-gel; SERS; Silver nanoparticles; DAPI
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Silver nanoparticle doped silica sol-gels and aerogels were investigated as possible substrates for the surface-enhanced Raman scattering (SERS) based detection of small molecules. The target molecule chosen for this study was 4',6-diamidino-2-phenylindole (DAPI), a fluorescent organic dye known to bind to DNA. Sol-gels were prepared by the acid-catalyzed hydrolysis of tetramethyl orthosilicate (TMOS) in the presence of DAPI and colloidal silver. Aerogels were prepared via carbon dioxide supercritical fluid drying of the sol-gels. SERS measurements of the sol- and aerogels were obtained following synthesis, and suggest that the materials tested are viable substrates for the SEAS detection of DAPI. (C) 2014 Elsevier B.V. All rights reserved.
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