Abstract
We present herein a silver nanostructure-assisted sensing platform which consists of a combined structure of Ag nanowire (NW) and nanodot (ND) array. Highly enhanced fluorescence from fluorophore is attributed to a strongly coupled optical near-field interaction between proximately located Ag NW and NDs. We obtained enhanced fluorescence intensity with up to 140 folds, as contrasted from background intensity, reaching a theoretical maximum value. On the other hand, fluorescence lifetime was greatly reduced to 0.27 ns (from 2.17 ns for the same fluorophores without nanostructure). This novel platform can be a promising utility for optical imaging and labeling of biological systems with a great sensitivity.
Original language | English |
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Article number | 056008 |
Journal | Journal of Biomedical Optics |
Volume | 16 |
Issue number | 5 |
DOIs | |
State | Published - May 2011 |
Keywords
- Ag nanowire
- Cell imaging
- Fluorescence
- Focused ion beam
- Nanodot