Effective in situ redox, epitaxial assembly of Cu2O@Ag and Ag cages in high yields were acquired through introducing [Ag(NH3)2]+ complexant to a dispersed Cu2O suspension under visible-light irradiation, in the absence of any other chemical. The [Ag(NH3)2]+ complexant plays a critical role in the Ag-shell growth and duplicating the morphology of the Cu2O template.
