Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Femtosecond laser-controlled tip-to-tip assembly and welding of gold nanorods NO PERMITE SUBIR EL FICHERO AL SER DE TAMAÑO EXCESIVO
Year:2015
Research Areas
  • Engineering
Information
Abstract
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.
International
Si
JCR
Si
Title
NANO LETTERS
ISBN
1530-6984
Impact factor JCR
Impact info
Volume
15
10.1021/acs.nanolett.5b03844
Journal number
From page
8282
To page
8288
Month
SIN MES
Ranking
Participants
  • 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)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Fusión Nuclear Inercial y Tecnología de fusión
  • Centro o Instituto I+D+i: Instituto de Fusión Nuclear
S2i 2021 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)