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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 9, Iss. 4 — Apr. 1, 2014

Three-dimensional multi-walled carbon nanotube arrays coated by gold-sol as a surface-enhanced Raman scattering substrate

Jie Zhang, Tuo Fan, Xiaolei Zhang, Chunhong Lai, and Yong Zhu  »View Author Affiliations


Applied Optics, Vol. 53, Issue 6, pp. 1159-1165 (2014)
http://dx.doi.org/10.1364/AO.53.001159


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Abstract

We demonstrated a three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrate consisting of large area carbon nanotube (CNT) arrays coated by gold-sol nanoparticles. A low-cost, simple process is used to prepare Au-decorated 3D CNT arrays. The SERS enhancement from the 3D CNT arrays, and two-dimensional (2D) CNT films substrates coated by different size gold-sol nanoparticles, was experimentally verified with Rhodamine 6G as the probe analyte. The experiments showed that the 3D CNT arrays substrate has a higher Raman enhancement compared with 2D CNT arrays substrate and planar glass substrate, due to the large specific surface area of CNT arrays and more gold nanoparticles on the CNT arrays sidewalls, which contribute the electromagnetic field and Raman intensity. Meanwhile, the 3D structure could enhance the excitation light trapping in CNT arrays, consequently increasing the light interaction with Au nanoparticles.

© 2014 Optical Society of America

OCIS Codes
(290.5860) Scattering : Scattering, Raman
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Scattering

History
Original Manuscript: August 9, 2013
Revised Manuscript: December 27, 2013
Manuscript Accepted: January 24, 2014
Published: February 19, 2014

Virtual Issues
Vol. 9, Iss. 4 Virtual Journal for Biomedical Optics

Citation
Jie Zhang, Tuo Fan, Xiaolei Zhang, Chunhong Lai, and Yong Zhu, "Three-dimensional multi-walled carbon nanotube arrays coated by gold-sol as a surface-enhanced Raman scattering substrate," Appl. Opt. 53, 1159-1165 (2014)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ao-53-6-1159


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