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Synthesis and Characterization of Spectroscopically Encoded Nanocomposites

Published online by Cambridge University Press:  01 February 2011

Baker Jawabrah Al-Hourani ,
Sheng Dai ,
Ramon A. Alvarez-Puebla ,
Juan P. Bravo-Vasquez  and
Hicham Fenniri
Baker Jawabrah Al-Hourani
Affiliation:
sigmatropic2002@yahoo.com, National Institute for Nanotechnology-University of Alberta, Chemistry, 11421 Saskatchewan Drive, Edmonton-AB, T6G2M9, Canada
Sheng Dai
Affiliation:
Sheng.Dai@nrc-cnrc.gc.ca, NRC National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton, AB, T6G 2M9, Canada
Ramon A. Alvarez-Puebla
Affiliation:
Ramon.Alvarez-Puebla@nrc-cnrc.gc.ca , NRC National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton, AB, T6G 2M9, Canada
Juan P. Bravo-Vasquez
Affiliation:
juanb@ualberta.ca, NRC National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton, AB, T6G 2M9, Canada
Hicham Fenniri
Affiliation:
Hicham.Fenniri@nrc-cnrc.gc.ca, NRC National Institute for Nanotechnology, 11421 Saskatchewan Drive, Edmonton, AB, T6G 2M9, Canada
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Abstract

Three sulfur-containing styrene monomers with different leaving groups, 4-vinylphenyl ethanethioate, 1,2-bis(4-vinylphenyl)disulfane, and butyl(4-vinylphenyl)sulfane, were synthesized through nucleophilic substitution/addition reactions and purified through column chromatography. In aqueous solution, these monomers could bind to the surface of gold nanoparticles and form self-assembled monolayers (SAMs). SAMs were analyzed by Raman spectroscopy and showed SERS activity with enhancement factors of more than 105. In addition, SAMs were also formed on the surface of gold/silver nano-island films. The bulk Raman and SERS spectra of monomers on different gold nanostructured materials were very similar. The enhancement factors and the formation of SAMs depended on monomer structure and fabrication method. Also depending on the deposition conditions, laser induced polymerization of the mercaptostyrene monomers SAMs was observed.

Keywords

Auself-assemblyRaman spectroscopy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1056: Symposium HH – Nanophase and Nanocomposite Materials V , 2007 , 1056-HH11-32
Copyright
Copyright © Materials Research Society 2008

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References

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