Hybrid Nanoparticles Based on Cobalt Ferrite and Gold: Preparation and Characterization

During the past few decades, hybrid nanoparticles (HNPs) based on a magnetic material and gold have attracted interest for applications in catalysis, diagnostics nanomedicine. In this paper, CoFe2O4/Au HNPs with an average particle size of 20 nm, decorated 2 nm clusters, were prepared using methionine as reducer anchor between CoFe2O4 gold. The was used to grow Au clusters solid shell (up 10 deposition cycles). obtained (NPs) studied by X-Ray diffraction (XRD), transmission electron microscopy (TEM), Fourier-transform infrared (FT-IR) spectroscopy, photoelectron spectroscopy (XPS) UV-vis techniques. TEM images showed that surface cobalt ferrite covered nanoclusters, which slightly increased increase number cycles (from 2.12 ± 0.15 after 1 cycle 2.46 0.13 density insignificantly decreased during repeated stages deposition: 21.4 2.7 NPs/CoFe2O4 NP cycle, 19.0 1.2 6 18.0 1.4 cycles. measurements possessed typical ferrimagnetic behavior, corresponds nanoparticles. toxicity evaluation synthesized Chlorella vulgaris indicated they can be applied biomedical such hyperthermia, photothermal therapy, drug delivery, bioimaging biosensing.