Journal
JOURNAL OF FLUORESCENCE
Volume 17, Issue 4, Pages 345-349Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10895-007-0196-y
Keywords
Metal-Enhanced Fluorescence (MEF); Metal-Enhanced Phosphorescence (MEP); Metal-Enhanced O-1(2) generation ((MEO2)-O-1); Photodynamic Therapy (PDT); surface enhanced fluorescence; plasmons; plasmonics; Radiative Decay Engineering (RDE); plasmon enhanced luminescence; plasmon enhanced fluorescence; fluorescence; singlet oxygen
Funding
- NCRR NIH HHS [RR008119] Funding Source: Medline
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In this Rapid Communication, we report the first observation of Metal-Enhanced singlet oxygen generation ((MEO2)-O-1). Rose Bengal in close proximity to Silver Island Films (SiFs) can generate more singlet oxygen, a three-fold increase observed, as compared to an identical glass control sample but containing no silver. The enhanced absorption of the photo-sensitizer, due to coupling to silver surface plasmons, facilitates enhanced singlet oxygen generation. The singlet oxygen yield can potentially be adjusted by modifying the choice of MEF (Metal-Enhanced Fluorescence) & MEP (Metal Enhance Phosphorescence) parameters, such as distance dependence for plasmon coupling and wavelength emission of the coupling fluorophore. This is a most helpful observation in understanding the interactions between plasmons and lumophores, and this approach may well be of significance for singlet oxygen based clinical therapy.
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