Tuning the chemiluminescence of a luminol flow using plasmonic nanoparticles

Light, Science & Applications
Alina KarabchevskyAlexey V Kavokin

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 implementation 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.

References

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Citations

Apr 22, 2018·Environmental Science and Pollution Research International·Supicha KachentonTawewan Tansatit
Oct 12, 2019·Scientific Reports·Christina M GeiselhartChristopher Barner-Kowollik
May 6, 2019·Optics Express·P D TerekhovA Karabchevsky
May 30, 2020·Journal of Pharmaceutical and Biomedical Analysis·Ana Sofia Abrantes DiasBruno Manadas
Mar 2, 2018·Chemical Reviews·Morgane VacherRoland Lindh
Jul 14, 2018·Analytical Chemistry·Jinqi DengXingyu Jiang

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Methods Mentioned

BETA
biosensing
chip
surface plasmon resonance
chips

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