Tuning the chemiluminescence of a luminol flow using plasmonic nanoparticles

Alina Karabchevsky, Ali Mosayyebi, Alexey V. Kavokin

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

We have discovered a strong increase in the intensity of the chemiluminescence of a luminol flow and a dramatic modification of its spectral shape in the presence of metallic nanoparticles. We observed that pumping gold and silver nanoparticles into a microfluidic device fabricated in polydimethylsiloxane prolongs the glow time of luminol. We have demonstrated that the intensity of chemiluminescence in the presence of nanospheres depends on the position along the microfluidic serpentine channel. We show that the enhancement factors can be controlled by the nanoparticle size and material. Spectrally, the emission peak of luminol overlaps with the absorption band of the nanospheres, which maximizes the effect of confined plasmons on the optical density of states in the vicinity of the luminol emission peak. These observations, interpreted in terms of the Purcell effect mediated by nano-plasmons, form an essential step toward the development of microfluidic chips with gain media. Practical imple-mentation of the discovered effect will include improving the detection limits of chemiluminescence for forensic science, research in biology and chemistry, and a number of commercial applications.

Original languageEnglish
Article numbere16164
Pages (from-to)1-7
Number of pages7
JournalLight: Science and Applications
Volume5
Issue number11
DOIs
StatePublished - 1 Jan 2016

Keywords

  • Chemiluminescence
  • Microfluidics
  • Nanoparticles
  • Plasmonics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics

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