Fluorescence enhancement of molecules inside a gold nanomatryoshka.
Nano Lett
; 14(5): 2926-33, 2014 May 14.
Article
en En
| MEDLINE
| ID: mdl-24738706
ABSTRACT
Metallic nanoparticles exhibiting plasmonic Fano resonances can provide large enhancements of their internal electric near field. Here we show that nanomatryoshkas, nanoparticles consisting of an Au core, an interstitial nanoscale SiO2 layer, and an Au shell layer, can selectively provide either a strong enhancement or a quenching of the spontaneous emission of fluorophores dispersed within their internal dielectric layer. This behavior can be understood by taking into account the near-field enhancement induced by the Fano resonance of the nanomatryoshka, which is responsible for enhanced absorption of the fluorophores incorporated into the nanocomplex. The combination of compact size and enhanced light emission with internal encapsulation of the fluorophores for increased biocompatibility suggests outstanding potential for this type of nanoparticle complex in biomedical applications.
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Espectrometría Raman
/
Técnicas Biosensibles
/
Nanopartículas del Metal
/
Oro
Idioma:
En
Año:
2014
Tipo del documento:
Article