Metal assisted chemical etching of silicon and solution synthesis of Cu-=SUB=-2-=/SUB=-O/Si radial nanowire array heterojunctions

Cu 2 O/Si radial nanowire (NWs) array heterojunctions were prepared by depositing O nanoparticles via chemical bath deposition on n-Si arrays that fabricated metal-assisted electroless etching. After 20 cycles of deposition, large numbers with form shells wrap the upper segment each Si nanowire. This method etching offers exceptional simplicity, flexibility, environmental friendliness, and scalability for fabrication three-dimensional silicon nanostructures considerable depths, because replacement harsh oxidants such as H AgNO 3 . Keywords: NWs heterojunctions, nanoparticles,