Nano Archive

Dependence of fluorescence intensity on the spectral overlap between fluorophores and plasmon resonant single silver nanoparticles

Chen, Yeechi and Munechika, Keiko and Ginger, David S. (2007) Dependence of fluorescence intensity on the spectral overlap between fluorophores and plasmon resonant single silver nanoparticles. NANO LETTERS, 7 (3). pp. 690-696.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl062795z

Abstract

We investigate the fluorescence from dyes coupled to individual DNA-functionalized metal nanoparticles. We use single-particle darkfield scattering and fluorescence microscopy to correlate the fluorescence intensity of the dyes with the localized surface plasmon resonance (LSPR) spectra of the individual metal nanoparticles to which they are attached. For each of three different dyes, we observe a strong correlation between the fluorescence intensity of the dye and the degree of spectral overlap with the plasmon resonance of the nanoparticle. On average, we observe the brightest fluorescence from dyes attached to metal nanoparticles that have a LSPR scattering peak ~40−120 meV higher in energy than the emission peak of the fluorophore. These results should prove useful for understanding and optimizing metal-enhanced fluorescence.

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Physical Science > Nano objects
Analytical Science > Beam methods
ID Code:2591
Deposited By:Anuj Seth
Deposited On:27 May 2009 11:57
Last Modified:27 May 2009 11:57

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