Tuning the chemiluminescence of a luminol flow using plasmonic nanoparticles

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.

Multipole analysis of dielectric metasurfaces composed of nonspherical nanoparticles and lattice invisibility effect

“…8,9 Nowadays, high-index nanostructures replace their metal counterparts for variety of applications due to high energy absorption of plasmon resonances in the optical wavelength range. [10][11][12] In contradiction to such plasmonic nanostructures suffering from both interand intraband transitions, 13 high-index materials allow light scattering without sufficient Ohmic losses. These properties of the high refractive index nanoparticles make them very attractive for practical applications in the field of optical nanoantennas, [14][15][16][17][18] coherent and nonlinear radiation sources, [19][20][21][22] Raman spectroscopy, 23,24 etc.…”

Multipolar response of nonspherical silicon nanoparticles in the visible and near-infrared spectral ranges

“…These subwavelength scatterers can support the excitation of electric and magnetic multipolar resonances [1][2][3][4][5][6][7] which enhance the light-matter interaction in a controllable manner by changing the nanoparticles size, geometry, and material [7,8]. Compared to the plasmonic nanoparticles, which reveal novel optical phenomena due to change in optical density of states [9,10], all-dielectric nanoantennas do not exhibit Joule losses. Desirable overlapping of certain multipole resonances of the dielectric nanoparticles can be used for different applications, including nanoantennas [11][12][13][14], sensors [15,16], solar cell technology [17], and multifunctional metasurfaces [18].…”

“…in (10) includes the interference of electric dipole (ED) and electric toroidal dipole (TD) moments and can be treated as total electric dipole moment (TED). In the general case high-order terms can provide additional contributions beyond toroidal dipole with the same radiation pattern [32].…”

Invisibility Cloaking Scheme by Evanescent Fields Distortion on Composite Plasmonic Waveguides with Si Nano-Spacer

“…However, obtaining effective material parameters for the metamaterials is not trivial due to their structural inhomogeneity and strong spatial dispersion 4 , 5 . The recent developments in metamaterial science 6 – 9 and nanotechnology 10 , 11 have enabled the possibility of cloaking an object to become a technological reality. One approach to achieve an invisibility cloak is transformation optics 12 , 13 .…”