Straightforward Syntheses of Alloys and Core-Shell Nanoparticles: The Benefits of Surfactant-Free Alcohol-Mediated Strategies Illustrated with Au-Ag Nanomaterials.

Core-shell nanoparticles present unique properties that their monometallic counterparts do not express. Unfortunately, the simple and environmentally friendly preparation of such advanced structures is challenging. A method that bypasses typical challenges in the synthesis of such materials is proposed based on a room-temperature monoalcohol-mediated synthesis without the need for surfactants. The concept is demonstrated with the straightforward synthesis of gold-silver alloys and core-shell nanostructures. The results pave the way for complex materials obtained by more sustainable surfactant-free approaches.