Figure 5From: Formation of silicon nanowire packed films from metallurgical-grade silicon powder using a two-step metal-assisted chemical etching methodSchematic illustration of the two-step MACE method leading to the formation of SiNWs from Si powder. (a) Reduction and nucleation of Ag+ and nanoclustering of Ag. (b) Production of silver microstructure and porous silicon layer. (c) Caving of silver nanoparticles and production of SiNWs.Back to article page