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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 4 — Feb. 15, 2012
  • pp: 680–682

Examining metal nanoparticle surface chemistry using hollow-core, photonic-crystal, fiber-assisted SERS

Fatemeh Eftekhari, Anna Lee, Eugenia Kumacheva, and Amr S. Helmy  »View Author Affiliations

Optics Letters, Vol. 37, Issue 4, pp. 680-682 (2012)

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In this Letter, we demonstrate the efficacy of hollow core photonic crystal fibers (HCPCFs) as a surface-enhanced Raman spectroscopy (SERS) platform for investigating the ligand exchange process on the surface of gold nanoparticles. Raman measurements carried out using this platform show the capability to monitor minute amounts of surface ligands on gold nanoparticles used as an SERS substrate. The SERS signal from an HCPCF exhibits a tenfold enhancement compared to that in a direct sampling scheme using a cuvette. Using exchange of cytotoxic cetyltrimethylammonium bromide with α-methoxy-ω-mercaptopoly(ethylene glycol) on the surface of gold nanorods as an exemplary system, we show the feasibility of using HCPCF SERS to monitor the change in surface chemistry of nanoparticles.

© 2012 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(280.4788) Remote sensing and sensors : Optical sensing and sensors
(060.5295) Fiber optics and optical communications : Photonic crystal fibers
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 29, 2011
Revised Manuscript: November 26, 2011
Manuscript Accepted: December 21, 2011
Published: February 14, 2012

Fatemeh Eftekhari, Anna Lee, Eugenia Kumacheva, and Amr S. Helmy, "Examining metal nanoparticle surface chemistry using hollow-core, photonic-crystal, fiber-assisted SERS," Opt. Lett. 37, 680-682 (2012)

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