| Full text | |
| Author(s): |
Guidelli, Eder Jose
;
Ramos, Ana Paula
;
Baffa, Oswaldo
Total Authors: 3
|
| Document type: | Journal article |
| Source: | SCIENTIFIC REPORTS; v. 6, NOV 16 2016. |
| Web of Science Citations: | 1 |
| Abstract | |
We used Optically Stimulated Luminescence (OSL) from X-ray-irradiated sodium chloride nanocrystals to investigate how silver nanoparticle (AgNP) films enhanced luminescence. We controlled the emitter-AgNP distance and used the OSL intensity and decay times to explore the plasmonic interactions underlying the enhanced luminescence. Both intensity and decay times depended on the emitter-AgNP distance, which suggested that a mechanism involving energy transfer from the localized surface plasmons (LSPs) to the trapped electrons took place through a distance-dependent coupling. Compared to other plasmon-enhanced mechanisms, the energy transfer observed here occurred in the opposite bias: LSP relaxation stimulated electron transfer from non-optically active traps to optically active traps, which culminated in enhanced emission. Therefore, a different mechanism of plasmonic coupling converted optically unreachable electrons into useful luminescence information. (AU) | |
| FAPESP's process: | 11/09521-8 - Optically stimulated luminescence under plasmon resonance conditions |
| Grantee: | Éder José Guidelli |
| Support Opportunities: | Scholarships in Brazil - Doctorate |