English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/102760
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Citado 22 veces en Web of Knowledge®  |  Ver citas en Google académico
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar otros formatos: Exportar EndNote (RIS)Exportar EndNote (RIS)Exportar EndNote (RIS)
Título

Optical response of metallic nanoparticle heteroaggregates with subnanometric gaps

Autor Tserkezis, C.; Taylor, Richard W.; Beitner, Jan; Esteban, Ruben; Baumberg, Jeremy J.; Aizpurua, Javier
Palabras clave Metallic nanoparticle aggregates
Subnanometric gaps
Plasmonics
Cucurbiturils
Optical response
Fecha de publicación 2014
EditorWiley-VCH
Citación Particle and Particle Systems Characterization 31(1): 152-160 (2014)
ResumenThe optical response of metallic nanoparticle heteroaggregates with well-defined, subnanometric interparticle gaps is studied both theoretically and experimentally for clusters formed by nanoparticles of different size and/or different material (Au and Ag). The optical spectra of the aggregates can be understood in terms of excitation of chain-like plasmon modes, which are associated with short and long linear chains that constitute the cluster internally. The dependence of the optical properties of the aggregates on the size of the metallic nanoparticles, the interparticle gaps, and the dielectric environment is revealed in model electromagnetic calculations. A rigid molecular linker, cucurbit[5]uril, is used to experimentally form Au heteroaggregates of different sized particles, as well as heteroaggregates of silver and gold. It is shown that in both types of heteroaggregates, the ratio of the two different nanoparticles provides a versatile and easily controllable way to tailor the dominant long-wavelength chain mode. Experimental tracing of the optical response of such heteroaggregates in time during aggregation supports the formation of long-wavelength modes, which can be attributed to excitation of long chains inside the clusters. Metallic nanoparticle heteroaggregates with subnanometric interparticle gaps are theoretically and experimentally studied. Two-component heteroaggregates composed of two different particle sizes or materials are designed, and their far- and near-field optical properties are analyzed in terms of excitation of modes associated with nanoparticle chains within the heteroclusters. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
URI http://hdl.handle.net/10261/102760
DOI10.1002/ppsc.201300287
Identificadoresdoi: 10.1002/ppsc.201300287
issn: 0934-0866
e-issn: 1521-4117
Aparece en las colecciones: (CFM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
accesoRestringido.pdf15,38 kBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 



NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.