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.
| Original language | English |
|---|---|
| Title of host publication | Technical Proceedings of the 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014 |
| Number of pages | 4 |
| Volume | 2 |
| Publisher | NSTI Nano Science and Technology Institute |
| Publication date | 2014 |
| Pages | 443-446 |
| ISBN (Print) | 9781482258271 |
| Publication status | Published - 2014 |
Keywords
- Optical cyanide detection
- Plasmon enhanced fluorescence
- Silver nanoparticles
- Silver quantum clusters