Enhancing single-nanoparticle surface-chemistry by plasmonic overheating in an optical trap.
Nano Lett
; 12(9): 4647-50, 2012 Sep 12.
Article
en En
| MEDLINE
| ID: mdl-22924589
ABSTRACT
Surface-chemistry of individual, optically trapped plasmonic nanoparticles is modified and accelerated by plasmonic overheating. Depending on the optical trapping power, gold nanorods can exhibit red shifts of their plasmon resonance (i.e., increasing aspect ratio) under oxidative conditions. In contrast, in bulk exclusively blue shifts (decreasing aspect ratios) are observed. Supported by calculations, we explain this finding by local temperatures in the trap exceeding the boiling point of the solvent that cannot be achieved in bulk.
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Resonancia por Plasmón de Superficie
/
Cristalización
/
Pinzas Ópticas
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Nanopartículas del Metal
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Oro
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Calefacción
Idioma:
En
Revista:
Nano Lett
Año:
2012
Tipo del documento:
Article
País de afiliación:
Alemania