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Journal of Nanomaterials
Volume 2012 (2012), Article ID 154278, 8 pages
http://dx.doi.org/10.1155/2012/154278
Research Article

Absorption Properties of Hybrid Composites of Gold Nanorods and Functionalized Single-Walled Carbon Nanotubes

1Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA
2Department of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078, USA

Received 10 October 2011; Accepted 15 December 2011

Academic Editor: Kin Tak Lau

Copyright © 2012 Deok-Jin Yu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We report on the optical properties of fabricated nanohybrid structures containing Au nanorods and functionalized single-walled carbon nanotubes in aqueous solutions. In particular, the absorption spectra of these hybrid materials are studied as a function of the concentration of the functionalized single-walled carbon nanotubes as well as the evolution time following preparation. The absorption spectra show a red shift of the longitudinal plasmon mode of the Au nanorods along with the emergence of broadened structures at wavelengths between 1000 and 1100 nm. These results, supported by TEM images, indicate the self-assembly of the Au nanorods forming on the sidewalls of the functionalized SWNTs driven by polyelectrolyte interactions.