INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
"Fabrication and ordering of noble metal nanoparticles through functional polymers”
Autor/es:
ANA LEDO SUAREZ; M. A. LÓPEZ QUINTELA; MASSIMO LAZZARI; ILEANA A. ZUCCHI; CRISTINA E. HOPPE
Lugar:
Granada
Reunión:
Congreso; European Polymer Congress (EPF), XII GEP Congress; 2011
Resumen:
Developments in polymer synthesis and functionalization over the last decades provided a wealth of polymer and copolymer structures with well-defined morphology, controlled architecture and functionality that are converting functional polymers in a unique tool for nanotechnological applications. In particular, functional polymers and especially block copolymers, may be used either as nanomaterials themselves, as template or scaffold for the preparation of nanostructured materials and also for the polymer-assisted controlled fabrication of well-defined metal or metal oxide nanoparticles (NPs). As an example, different functionalized polymer matrixes were employed to prepare metallic NPs dispersed in polymer medium by in situ synthesis technique.In this communication we present our recent results on the use of chain-end functional polymers for controlling the synthesis of noble metal NPs, with some reference to their distribution into block copolymer nanostructured morphologies. In particular, we report on the use of different -thiol (a functional group with high affinity for noble metal surfaces) polyacrylonitrile (PAN), poly(methyl methacrylate) (PMMA) and polystyrene (PS) ligands, opportunely prepared by controlled/living radical polymerization, as capping agents in the preparation of Au NPs through a one-step procedure.The influence of molecular weight, polymer concentration and temperature was studied for different systems, also comparing the behavior of the chain-end functional polymers with those of the corresponding homopolymers without any active chain-ends. Polymer ligands and their interaction with the metal surface were mainly studied by FTIR and NMR spectroscopies, whereas TEM, UV-vis spectroscopy and thermo- gravimetric analysis allowed characterizing the metal NPs.