期刊
LANGMUIR
卷 26, 期 14, 页码 12371-12376出版社
AMER CHEMICAL SOC
DOI: 10.1021/la101801n
关键词
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资金
- Institute of Fluorescence
- UMBC (University of Maryland Baltimore County)
Multilayers of nanoburger structures of silver island films-SiO2-silver island films (SIFs-SiO2-SIFs) were used as substrates to study the fluorescence of close-proximity fluorophores. Compared to single-layered SIFs, multilayer nanoburgers exhibit several distinctive properties including a significantly enhanced fluorescence intensity, decreased lifetimes, and increased fluorphore photostability by simply varying the dielectric layer thickness while the SIC layer is kept constant. Finite-difference time-domain (FDTD) calculations show that the maximum electric field intensity can be tuned by varying the distance between the silver particles. Enhanced fluorescence emission coupled with a reduced fluorophore lifetime suggests that both an electric field and plasmon-coupling component are the underlying mechanisms for nanoburger-based metal-enhanced fluorescence (MEF). This tunable multilayer nanoburger structure holds great potential for applications in biology, microscopy, imaging, and biomedical research, given the current uses of MEF.
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