A versatile colloidal Janus platform: surface asymmetry control, functionalization, and applications

We show a facile synthetic route towards colloidal SiO 2 -based Janus particles with tunable asymmetries and functionalities based on the integrated use of silane mixtures, Pickering emulsions, and polydopamine chemistry. We demonstrate the generic nature of the concept and application potential by presenting several functionalities. A versatile colloidal Janus platform with tunable surface asymmetries and functions was achieved and can play multiple roles as Pickering emulsifiers, catalysts and magnetic vectors in wastewater remedy.