Abstract
Fluorescence microscopy of individual silver quantum clusters on the surface of silver nanoparticles reveals strong photoactivated emission under blue light excitation [1-4]. In this work, silver nanoparticles are produced by annealing silver thin films deposited on a glass substrate and silver quantum clusters are subsequently synthesized at the surface of the nanoparticles by photoactivation in presence of Ag+ cations in solution. The photogeneration of these silver quantum clusters leads to a great increase in the fluorescent signal.
This photoactivated surface can then be used for sensing purposes. It was found, that in presence of a strong nucleophile (such as CN-), silver quantum clusters are dissolved into non-fluorescing AgCN complexes, resulting in a fast and observable decrease of the fluorescent signal.
This photoactivated surface can then be used for sensing purposes. It was found, that in presence of a strong nucleophile (such as CN-), silver quantum clusters are dissolved into non-fluorescing AgCN complexes, resulting in a fast and observable decrease of the fluorescent signal.
| Original language | English |
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| Title of host publication | Proceedings of Nanotech 2014 |
| Number of pages | 4 |
| Publication date | 2014 |
| Publication status | Published - 2014 |
| Event | Nanotech 2014: Nanotechnology Conference and Expo - Gaylord National Hotel and Convention Center, Washington DC, United States Duration: 15 Jun 2014 → 18 Jun 2014 |
Conference
| Conference | Nanotech 2014 |
|---|---|
| Location | Gaylord National Hotel and Convention Center |
| Country | United States |
| City | Washington DC |
| Period | 15/06/2014 → 18/06/2014 |
Keywords
- Silver quantum clusters
- Silver nanoparticles
- Plasmon enhanced fluorescence
- Optical cyanide detection