Fluorescence quenching in molecules near rough metal surfaces
نویسندگان
چکیده
A classical electrodynamic near field calculation for the interaction of a Drude oscillator molecular dipole with a rough metal surface is presented. Effects of electromagnetic coupling between surface bumps (assumed to be prolate hemispheroids) and the bulk metal are included. Fluorescence lifetimes are found to be two to four orders of magnitude smaller than those predicted for a flat plane in calculations on silver, and for sufficiently short distances, an avoided crossing splitting is predicted. PACS numbers: 68.90+g, 78.30.Er, and 33.50.-j. _____________ Text of "A. C. Pineda and David Ronis, J. Chem. Phys. 83(10), 5330 (1985)" with † a few corrections. Alfred P. Sloan Research Fellow *
منابع مشابه
Overcoming metal-induced fluorescence quenching on plasmo-photonic metasurfaces coated by a self-assembled monolayer.
We have experimentally shown significant suppression of metal-induced fluorescence (FL) quenching on plasmo-photonic metasurfaces by incorporating a self-assembled monolayer (SAM) of sub-nm thickness. The FL signals of rhodamine dye molecules have been several-ten-fold enhanced by introducing the SAM, in comparison with the previous configuration contacting molecules and metal surfaces.
متن کاملRadiative decay engineering 5: metal-enhanced fluorescence and plasmon emission.
Metallic particles and surfaces display diverse and complex optical properties. Examples include the intense colors of noble metal colloids, surface plasmon resonance absorption by thin metal films, and quenching of excited fluorophores near the metal surfaces. Recently, the interactions of fluorophores with metallic particles and surfaces (metals) have been used to obtain increased fluorescenc...
متن کاملRadiative decay engineering: biophysical and biomedical applications.
Fluorescence spectroscopy is a widely used research tool in biochemistry and molecular biology. Fluorescence has also become the dominant method enabling the revolution in medical diagnostics, DNA sequencing, and genomics. To date all the fluorescence observables, including spectral shifts, anisotropies, quantum yields, and lifetimes, have all been utilized in basic and applied uses of fluoresc...
متن کاملA Nanostructured Polyelectrolyte Sensing System Based on Quenching Analysis for Micromolar Metal Ions Detection
We designed and developed a novel heavy metal ion sensing device, based on quenching mechanism, exploiting the characteristics of a polyelectrolyte nanostructured system, named nanocapsule[1]. Nanocapsule allows to entrap fluorescent probes sensitive to a specific metal ion, localizing fluorescent signal in a nano-bordered site within the outermost layers and improving the signal to noise ratio...
متن کاملEffects of Metallic Nanoalloys on Dye Fluorescence
Metallic nanoparticles (NPs) are exploited for their ability to interact with organic compounds and to increase significantly the fluorescence intensity and the photostability of many fluorescent dye molecules. Metal enhanced fluorescence (MEF) is therefore widely investigated for biosensing applications. When used in immunoassays, silver island films (SIFs) could augment the fluorescence inten...
متن کامل