Author(s): Lamsaf, H. ; Lenzi, V. ; Marques, L. ; Rebouta, L. ; Carvalho, S. ; Ballesteros, Lina F. ; Cerqueira, Miguel Ângelo Parente Ribeiro ; Teixeira, J. A. ; Pastrana, L. ; Calderon V. S.
Date: 2021
Persistent ID: https://hdl.handle.net/1822/72587
Origin: RepositóriUM - Universidade do Minho
Subject(s): bimetallic; STEM; EELS tomography; oxygen scavengers; nanomaterial
Bimetallic nanoparticles have gained attention in the last decade due to their unusual characteristics compared to monometallic counterparts. However, production of such particles with controlled morphologies and composition need to be explored and the mechanisms understood. In this work, we demonstrate a fast and simple process to obtain flower-like Zn-Fe (Zinc-Iron) nanoparticles (NPs) using a hybrid system based on the combination of conventional magnetron sputtering and a cluster beam source. The morphology and structure were characterized by Scanning transmission electron microscopy (STEM), while the chemical composition was evaluated by simultaneous acquisition of Energy-dispersive X-ray spectroscopy (EDS) and Electron energy loss spectroscopy (EELS). Besides, molecular dynamic simulations were used to model the nanoparticle collisions during the simultaneous production, revealing the formation mechanisms of the flower-like nanoparticles.
