Nanofabrication of hollowed-out Au@AgPt core-frames selective carving of silver and deposition of platinum

Here, a hollowed-out Au@AgPt core-frame nanostructure is carved in the presence of PtCl 6 2− via galvanic replacement (GR) reaction, during which the dissolution of Ag atoms from the {100} facets and the deposition of Pt atoms on the active edges of the nanocubes occur. Both ex situ and in situ monitoring of the plasmonic and structural evolutions at the single-particle level, confirmed also by theoretical simulations, shows a three-phase mechanism involved. Nanofabrication of a hollowed-out Au@AgPt core-frame is presented, which is based on the selective deposition of Pt atoms on the active edges of the cubes and dissolution of Ag atoms from the {100} facets.