Ketyl radicals offer a simple, versatile and environmentally friendly route to the extensive production of both metal nanoparticles (NPs, e.g. Au, Ag, AuAg, Cu, Pt, Pd, Co) and quantum dots (QDs, e.g. ZnO, CuO, CeO2, MoO3, WO3). Through a single-step process, adjustment of reaction conditions allows the production of a variety of nanoparticle morphology and topology. For instance, aqueous solutions containing Ag(I) and Au(III) ionic species allow the production of either AuAg alloy or Au(core)-Ag(shells) NPs by simply varying the availability of reducing ketyl radicals. In parallel, by adjusting the concentration of surfactants (stabilizing ligands and nanoreactor precursors) specific nanoparticle topologies can be favored (e.g. core-shell vs. rod-shaped nanoparticles). For reactive metals, the reduction process in aqueous media produces metal-oxides QDs, e.g. ZnO, CeO2. The synthetic route to nanomaterials under discussion offers substantial advantages over established methodologies, i.e. i) mild reaction conditions and short reaction times, ii) low cost, iii) versatility, iv) compatible with both aqueous and organic media. In spite of this, the method has been scarcely investigated. In this contribution, the advantages of this methodology will be discussed and relevant examples (innovative results) will be presented (e.g. Au, Ag, Cu, AuAg bimetallic NPs, and ZnO, CeO2 QDs).Preparation of AuAg nanoparticles with different architecture and composition

Facile synthesis of metal nanoparticles and quantum dots using ketyl radicals

247th National Meeting (2014)

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