Nanoporous films (NPFs) of copper, silver, and gold were directly fabricated on the corresponding metal substrates by a general alloying/dealloying process. This process involved the electrodeposition of Zn on metal surfaces, thermal alloying, and chemical dealloying of Zn. Electrodeposition of Zn on metal substrates was realized in commercial Zn plating electrolyte at room temperature. Then surface zinc-metal alloys were formed by thermal treatment at relatively low temperatures (below 150°C) in nitrogen gas. By immersing the alloys in etching solutions, we obtained metal NPFs through che...
