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Optics Letters

Optics Letters


  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 14 — Jul. 15, 2014
  • pp: 4184–4187

Si/ZnO nanocomb arrays decorated with Ag nanoparticles for highly efficient surface-enhanced Raman scattering

Hong Jun Yin, Yu Fei Chan, Zheng Long Wu, and Hai Jun Xu  »View Author Affiliations

Optics Letters, Vol. 39, Issue 14, pp. 4184-4187 (2014)

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High-density ZnO nanocombs were first grown on a nanoporous silicon pillar array, and pre-prepared 3D Si/ZnO/Ag nanocomb arrays were employed as substrates for surface-enhanced Raman scattering (SERS). The finite-difference time-domain simulation result shows that two kinds of inter-Ag–NP nanogaps in the geometry create a large number of SERS “hot spots,” which contributes to the detection limits for rhodamine–6G as low as 1012M and the Raman enhancement factor as large as 109. The linear dependence between the Raman peak intensities and the concentrations of thiram provides a new calibration method for rapid and quantitative detection of trace organic molecules.

© 2014 Optical Society of America

OCIS Codes
(290.5860) Scattering : Scattering, Raman
(300.6450) Spectroscopy : Spectroscopy, Raman
(160.4236) Materials : Nanomaterials
(250.5403) Optoelectronics : Plasmonics

ToC Category:

Original Manuscript: April 14, 2014
Revised Manuscript: May 29, 2014
Manuscript Accepted: June 10, 2014
Published: July 10, 2014

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

Hong Jun Yin, Yu Fei Chan, Zheng Long Wu, and Hai Jun Xu, "Si/ZnO nanocomb arrays decorated with Ag nanoparticles for highly efficient surface-enhanced Raman scattering," Opt. Lett. 39, 4184-4187 (2014)

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