INQUIMAE   12526
INSTITUTO DE QUIMICA, FISICA DE LOS MATERIALES, MEDIOAMBIENTE Y ENERGIA
Unidad Ejecutora - UE
artículos
Título:
Nanochemistry in Confined Environments: Polyelectrolyte Brush-Assisted Synthesis of Gold Nanoparticles inside Ordered Mesoporous Thin Films
Autor/es:
A. CALVO; C. M. FUERTES; B. YAMEEN; F. J. WILLIAMS; O. AZZARONI; G. J. A. A. SOLER-ILLIA
Revista:
LANGMUIR
Editorial:
AMER CHEMICAL SOC
Referencias:
Año: 2010 vol. 26 p. 5559 - 5567
ISSN:
0743-7463
Resumen:
A robust and straightforward strategy allowing the controlled confinement of metal nanoparticles within the 3D
framework of mesoporous films is presented. The chemical methodology is based on the inner surface modification of
mesoporous silica films with polyelectrolyte brushes. We demonstrate that the macromolecular building blocks
significantly enhance the site-selective preconcentration of nanoparticle precursors in the inner environment of the
mesoporous film. Then, chemical reduction of the preconcentrated precursors led to the formation of metal
nanoparticles locally addressed in the mesoporous structure. We show that the synergy taking place between two
versatile functional nanobuilding blocks (ordered mesocavities and polymer brushes) can produce stable embedded
nanoparticles with tuned optical properties in a very simple manner. As a general framework, the strategy can be easily
adapted to different sets of polymer brushes and mesoporous films in order to regulate the monomer-precursor
interactions and, consequently, manipulate the site-selective character of the different chemistries taking place in the
film. We consider that the integrative chemistry approach described in this work provides new pathways to
manipulate the physicochemical characteristics of hybrid organic-inorganic advanced functional assemblies based
on the rational design of chemistry and topology in confined environments-precursor
interactions and, consequently, manipulate the site-selective character of the different chemistries taking place in the
film. We consider that the integrative chemistry approach described in this work provides new pathways to
manipulate the physicochemical characteristics of hybrid organic-inorganic advanced functional assemblies based
on the rational design of chemistry and topology in confined environments-inorganic advanced functional assemblies based
on the rational design of chemistry and topology in confined environments