Karabchevsky, A., Mosayyebi, A. & Kavokin, A. V. Tuning the chemiluminescence of a luminol flow using plasmonic nanoparticles. Light: Science & Applications, 5, e16164 (2016).
DOI:
Karabchevsky, A., Mosayyebi, A. & Kavokin, A. V. Tuning the chemiluminescence of a luminol flow using plasmonic nanoparticles. Light: Science & Applications, 5, e16164 (2016). DOI: 10.1038/lsa.2016.164.
Tuning the chemiluminescence of a luminol flow using plasmonic nanoparticles
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 implementation of the discovered effect will include improving the detection limits of chemiluminescence for forensic science
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