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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 16 — Aug. 11, 2014
  • pp: 18966–18978

Metallic-nanoparticles-enhanced fluorescence from individual micron-sized aerosol particles on-the-fly

Vasanthi Sivaprakasam, Matthew B. Hart, Vaibhav Jain, and Jay D. Eversole  »View Author Affiliations

Optics Express, Vol. 22, Issue 16, pp. 18966-18978 (2014)

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Fluorescence spectra from individual aerosol particles that were either coated or embedded with metallic nanoparticles (MNPs) was acquired on-the-fly using 266 nm and 355 nm excitation. Using aqueous suspensions of MNPs with either polystyrene latex (PSL) spheres or dissolved proteins (tryptophan or ovalbumin), we generated PSL spheres coated with MNPs, or protein clusters embedded with MNPs as aerosols. Both enhanced and quenched fluorescence intensities were observed as a function of MNP concentration. Optimizing MNP material, size and spacing should yield enhanced sensitivity for specific aerosol materials that could be exploited to improve detection limits of single-particle, on-the-fly fluorescence or Raman based spectroscopic sensors.

© 2014 Optical Society of America

OCIS Codes
(010.1110) Atmospheric and oceanic optics : Aerosols
(240.6680) Optics at surfaces : Surface plasmons
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(350.4238) Other areas of optics : Nanophotonics and photonic crystals
(240.6695) Optics at surfaces : Surface-enhanced Raman scattering

ToC Category:

Original Manuscript: May 21, 2014
Revised Manuscript: July 11, 2014
Manuscript Accepted: July 12, 2014
Published: July 29, 2014

Vasanthi Sivaprakasam, Matthew B. Hart, Vaibhav Jain, and Jay D. Eversole, "Metallic-nanoparticles-enhanced fluorescence from individual micron-sized aerosol particles on-the-fly," Opt. Express 22, 18966-18978 (2014)

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