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

Fatemeh Eftekhari, Anna Lee, Eugenia Kumacheva, Amr S. Helmy

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)680-682
Number of pages3
JournalOptics Letters
Volume37
Issue number4
DOIs
StatePublished - Feb 15 2012
Externally publishedYes

Fingerprint

Dive into the research topics of 'Examining metal nanoparticle surface chemistry using hollow-core, photonic-crystal, fiber-assisted SERS'. Together they form a unique fingerprint.

Cite this