Abstract
Functionalized superparamagnetic nanoparticles (Nps) are among the most investigated research topics. In this study, we present an efficient protocol for gold deposition onto the surface of cobalt ferrite (CoFe2O4) Nps by a simple one-pot reduction of AuCl4– ions with amino acid methionine, which, in turn, produces the biocompatible stabilizing shell. In contrast to previously reported gold deposition recipes, the one suggested herein is distinguished by the simplicity and prevention of monogold crystallite nucleation and growth in the deposition solution bulk. To demonstrate the preferential deposition of gold onto the surface of ferrite Nps, high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX), inductively coupled plasma mass spectrometry, and Fourrier-transformed infrared spectroscopy (FTIR) investigations have been performed. The innovative gold deposition method is expected to open new horizons for the design of biocompatible water dispersible gold/meth...
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