Plasmonically tunable blue-shifted emission from coumarin 153 in Ag nanostructure random media : a demonstration of fast dynamic surface-enhanced fluorescence
Enhancement of intensity and wavelength tunability of emission are desirable features for light-emitting device applications. We report on the large and tunable blue shift (60 nm) in emission from an environment-sensitive fluorophore (Coumarin153) embedded in Ag plasmonic randommedia. Coumarin...
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| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/103698 http://hdl.handle.net/10220/25810 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Enhancement of intensity and wavelength tunability
of emission are desirable features for light-emitting device
applications. We report on the large and tunable blue shift
(60 nm) in emission from an environment-sensitive
fluorophore (Coumarin153) embedded in Ag plasmonic randommedia.
Coumarin 153 having emission at 555 nm, show a
systematic blue shift (to 542, 503 and 495 nm) upon infiltration
into random media fabricated by Ag nanowires of different
aspect ratio (hence, surface plasmon resonances at 426,
445 and 464 nm). The blue shift is due to the fast dynamic
surface-enhanced fluorescence mechanism and can be tuned
by controlling the surface plasmon resonance and hotspot
density in random media. Enhanced emission at desired wavelength
is achieved by using nanostructures having higher
extinction coefficient but same-surface plasmon resonance.
Ag nanostructures of different aspect ratio used for fabricating
the random media are synthesized by chemical route. |
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