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Artículos en revistas:
Femtosecond laser-controlled tip-to-tip assembly and welding of gold nanorods NO PERMITE SUBIR EL FICHERO AL SER DE TAMAÑO EXCESIVO
Año:2015
Áreas de investigación
  • Ingenierías
Datos
Descripción
Directed assembly of gold nanorods through the use of dithiolated molecular linkers is one of the most efficient methodologies for the morphologically controlled tipto- tip assembly of this type of anisotropic nanocrystals. However, in a direct analogy to molecular polymerization synthesis, this process is characterized by difficulties in chaingrowth control over nanoparticle oligomers. In particular, it is nearly impossible to favor the formation of one type of oligomer, making the methodology hard to use for actual applications in nanoplasmonics. We propose here a lightcontrolled synthetic procedure that allows obtaining selected plasmonic oligomers in high yield and with reaction times in the scale of minutes by irradiation with low fluence near-infrared (NIR) femtosecond laser pulses. Selective inhibition of the formation of gold nanorod n-mers (trimers) with a longitudinal localized surface plasmon in resonance with a 800 nm Ti:sapphire laser, allowed efficient trapping of the (n ? 1)-mers (dimers) by hot spot mediated photothermal decomposition of the interparticle molecular linkers. Laser irradiation at higher energies produced near-field enhancement at the interparticle gaps, which is large enough to melt gold nanorod tips, offering a new pathway toward tip-to-tip welding of gold nanorod oligomers with a plasmonic response at the NIR. Thorough optical and electron microscopy characterization indicates that plasmonic oligomers can be selectively trapped and welded, which has been analyzed in terms of a model that predicts with reasonable accuracy the relative concentrations of the main plasmonic species.
Internacional
Si
JCR del ISI
Si
Título de la revista
NANO LETTERS
ISSN
1530-6984
Factor de impacto JCR
Información de impacto
Volumen
15
DOI
10.1021/acs.nanolett.5b03844
Número de revista
Desde la página
8282
Hasta la página
8288
Mes
SIN MES
Ranking
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: G. González-Rubio (Departamento de Química Física I, Universidad Complutense de Madrid)
  • Autor: J. González-Izquierdo (Departamento de Química Física I, Universidad Complutense de Madrid)
  • Autor: L. Bañares (Departamento de Química Física I, Universidad Complutense de Madrid)
  • Autor: G. Tardajos (Departamento de Química Física I, Universidad Complutense de Madrid)
  • Autor: Antonio Juan Rivera de Mena (UPM)
  • Autor: T. Altantzis (EMAT-University of Antwerp, Groenenborgerlaan)
  • Autor: S. Bals (EMAT-University of Antwerp, Groenenborgerlaan)
  • Autor: Ovidio Yordanis Peña Rodriguez (UPM)
  • Autor: A. Guerrero-Martínez (Departamento de Química Física I, Universidad Complutense de Madrid)
  • Autor: L.M. Liz-Marza¿n (BioNanoPlasmonics Laboratory, CIC biomaGUNE)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
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