Plasmonic engineering fluorescence

Cade NI, Ritman-Meer T, Kwaka K, Richards D (2009) The plasmonic engineering of metal nanoparticles for enhanced fluorescence and Raman scattering. Nanotechnology 20 285201... 

The Role Of Plasmonic Engineering In Potential Surface-Enhanced Fluorescence... 

Lakowicz JR (2005) Radiative decay engineering 5 metal-enhanced fluorescence and plasmon emission. Anal Biochem 337 171-94... 

Liebermann, T., and Knoll, W. (2000). Surface-plasmon field-enhanced fluorescence spectroscopy. Colloid and Surfaces A. Physicochemical and Engineering Aspects 171 115-130. 

Enhancement and quenching of the secondary emission of poly-L-Iysine stained by eosin and hematoxylin immobilized between two plasmonic silver films (PSFs) are reported. Optical engineering of PSF involving the turning of localized plasmon (LP) band in resonance to dyes absorption and fluorescence bands is discussed as the way to successful PSF application in clinical assays. 

The two SERS bands of eosin at 292 and 500 cm" are developed in spectrum 1 on Fig. 2b. It indicates the major plasmon-dependent mechanism of fluorescence enhancement. Besides the plasmon enhancement, the interference effect between two silver surfaces is possible. We suggest that both these effects are responsible for an observable phenomenon. But more sensitive parameters for the secondary emission enhancement can be tuned through engineering of LP band position and optical density. The low and disadvantageous spectral overlap of LP and molecular absorption bands, as well as the silver deposition excess lead to the significant quenching of analyte fluorescence. 

Singh, M. Sinhaa, L, Premkumarc, M, Singhc, A.K, Mandal, RK (2010). Structural and Surface Plasmon Behavior of Cu Nanoparticles using Different Stabilizers, Colloids and Surfaces A Physicochemical and Engineering Acspects, Vol.359, pp.88-94, ISSN 0927-7757 Siwach, O. P. Sen, P., (2010). Study of fluorescence properties of Cu nanopartides. Solid State Sciences, Vol.l2, pp.1107-1111, ISSN 1293-2558... 

In an attempt to overcome this limit of detection we recently introduced surface plasmon field-enhanced fluorescence spectroscopy (SPFS) following an earlier report liy Attridge et al. The basic principle of this approach combines the excitation of a surface plasmon mode as an interfacial light source with the well-established detection schemes of fluorescence spectroscopy the resonantly excited surface plasmon waves excite chromophores that are attached to the analyte either chemically or by genetic engineering techniques. The emitted fluorescence photons are then monitored and analyzed in the usual way to give information about the behavior of the analyte itself. 

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