Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
Supramolecular Control over the Interparticle Distance in Gold Nanoparticle Arrays by Cyclodextrin Polyrotaxanes
Year:2018
Research Areas
  • Engineering
Information
Abstract
Amphiphilic nonionic ligands, synthesized with a fixed hydrophobic moiety formed by a thiolated alkyl chain and an aromatic ring, and with a hydrophilic tail composed of a variable number of oxyethylene units, were used to functionalize spherical gold nanoparticles (AuNPs) in water. Steady-state and time-resolved fluorescence measurements of the AuNPs in the presence of ?-cyclodextrin (?-CD) revealed the formation of supramolecular complexes between the ligand and macrocycle at the surface of the nanocrystals. The addition of ?-CD induced the formation of inclusion complexes with a high apparent binding constant that decreased with the increasing oxyethylene chain length. The formation of polyrotaxanes at the surface of AuNPs, in which many ?-CDs are trapped as hosts on the long and linear ligands, was demonstrated by the formation of large and homogeneous arrays of self-assembled AuNPs with hexagonal close packing, where the interparticle distance increased with the length of the oxyethylene chain. The estimated number of ?-CDs per polyrotaxane suggests a high rigidization of the ligand upon complexation, allowing for nearly perfect control of the interparticle distance in the arrays. This degree of supramolecular control was extended to arrays formed by AuNPs stabilized with polyethylene glycol and even to binary arrays. Electromagnetic simulations showed that the enhancement and distribution of the electric field can be finely controlled in these plasmonic arrays.
International
Si
JCR
Si
Title
Nanomaterials
ISBN
2079-4991
Impact factor JCR
3,504
Impact info
Datos JCR del año 2017
Volume
Journal number
From page
168
To page
187
Month
SIN MES
Ranking
Participants
  • Autor: Joao Paulo Coelho (Departamento de Química Física, Universidad Complutense de Madrid)
  • Autor: José Osío Barciona (Departamento de Química Orgánica, Universidad Complutense de Madrid)
  • Autor: Elena Junquera (Departamento de Química Física, Universidad Complutense de Madrid)
  • Autor: Emilio Aicart (Departamento de Química Física, Universidad Complutense de Madrid)
  • Autor: Gloria Tardajos (Departamento de Química Física, Universidad Complutense de Madrid)
  • Autor: Sergio Gómez Graña (Departamento de Química en Ciencias Farmacéuticas, Universidad Complutense de Madrid)
  • Autor: Pablo Cruz Gil (Departamento de Química Orgánica, Universidad Complutense de Madrid)
  • Autor: Cástor Salgado (Departamento de Química Orgánica, Universidad Complutense de Madrid)
  • Autor: Pablo Díaz Núñez (UPM)
  • Autor: Ovidio Yordanis Peña Rodriguez (UPM)
  • Autor: Andrés Guerrero Martínez (Departamento de Química Física, Universidad Complutense de Madrid)
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 "Guillermo Velarde"
  • Departamento: Ingeniería Energética
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)