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Gold nanoparticles quench fluorescence by phase induced radiative rate suppression
- Source :
- Nano letters. 5(4)
- Publication Year :
- 2005
-
Abstract
- The fluorescence quantum yield of Cy5 molecules attached to gold nanoparticles via ssDNA spacers is measured for Cy5-nanoparticle distances between 2 and 16 nm. Different numbers of ssDNA per nanoparticle allow to fine-tune the distance. The change of the radiative and nonradiative molecular decay rates with distance is determined using time-resolved photoluminescence spectroscopy. Remarkably, the distance dependent quantum efficiency is almost exclusively governed by the radiative rate.
- Subjects :
- Photoluminescence
Chemistry
Mechanical Engineering
Nanoparticle
Quantum yield
DNA, Single-Stranded
Bioengineering
General Chemistry
Carbocyanines
Condensed Matter Physics
Photochemistry
Fluorescence
Molecular physics
Nanostructures
Colloidal gold
Radiative transfer
General Materials Science
Quantum efficiency
Gold
Spectroscopy
Fluorescent Dyes
Subjects
Details
- ISSN :
- 15306984
- Volume :
- 5
- Issue :
- 4
- Database :
- OpenAIRE
- Journal :
- Nano letters
- Accession number :
- edsair.doi.dedup.....2a4b69e8756b88e08b5f025e4f861de2