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Increasing the enhancement factor in plasmon-enhanced fluorescence with shell-isolated nanoparticles

Abstract: Three central experimental variables are looked at to increase the observed enhancement factor in plasmon-enhanced fluorescence: nanoparticle size, nanoparticle aggregation, and the sample temperature. The rise in emission intensity is demonstrated here in carefully chosen experimental conditions. First, it is shown that shell-isolated nanoparticles of gold (Au-SHINs) with a core of 100 nm produce a higher enhancement factor than smaller Au-SHINs (with a core of 40 nm) in solution and on Langmuir?Blodgett (LB) films. The enhancement factor is further increased by aggregation of the Au-SHINs in solution, and the findings are supported by finite-difference time-domain (FDTD) computations. Second, the enhancement factor (110-fold) of plasmon-enhanced fluorescence achieved with large Au-SHINs on an LB film of eosin decyl ester (EOSDEC) increases dramatically at low temperatures (170 fold). High enhancement factors are underpinned by a close matching of the plasmon extinction and fluorescence emission.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Journal of physical chemistry C, 2016, 120(37), 20530-20535

Editorial: American Chemical Society

 Año de publicación: 2016

Nº de páginas: 6

Tipo de publicación: Artículo de Revista

 DOI: 10.1021/acs.jpcc.5b09215

ISSN: 1932-7447,1932-7455

Url de la publicación: https://doi.org/10.1021/acs.jpcc.5b09215

Autoría

CAMACHO, S.A.

AOKI, P.H.B.

OLIVEIRA, OSVALDO N.

CONSTANTINO, C.J.L.

AROCA, R. F.