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A novel route to obtain metal and oxide nanoparticles co-existing on a substrate
Authors:A Serrano  JF Fernández  O Rodríguez de la Fuente  MA García
Institution:1. Departamento de Física de Materiales, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040, Madrid, Spain;2. Instituto de Cerámica y Vidrio, Consejo Superior de Investigaciones Científicas, C/ Kelsen 5, Cantoblanco, 28049, Madrid, Spain;3. Instituto de Magnetismo Aplicado “Salvador Velayos”, Universidad Complutense de Madrid, 28230, Madrid, Spain
Abstract:In this work we present a novel route to cover large surfaces with metal and oxide nanoparticles (NPs) by growing and annealing of metallic bilayers. We have used this method to fabricate ensembles of Au and α-Fe2O3 NPs on silica substrates from Fe/Au bilayers. The morphology of the hybrid nanostructures and the presence of defects and disorder can be tuned through the processing parameters as the initial film thickness and the annealing conditions. The proximity effects between both types of NPs alter their physical properties. In particular, we observe that the presence of α-Fe2O3 NPs modifies the surface plasmon resonance of Au NPs.
Keywords:Hybrid nanoparticles  Thin films  Annealing  Surface plasmons
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