| Texto completo | |
| Autor(es): |
Guidelli, Eder Jose
;
Ramos, Ana Paula
;
Baffa, Oswaldo
Número total de Autores: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | SCIENTIFIC REPORTS; v. 6, NOV 16 2016. |
| Citações Web of Science: | 1 |
| Resumo | |
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) | |
| Processo FAPESP: | 11/09521-8 - Luminescência opticamente estimulada em condições de ressonância plasmônica |
| Beneficiário: | Éder José Guidelli |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |