Figure 1From: Formation mechanisms of nano and microcones by laser radiation on surfaces of Si, Ge, and SiGe crystalsSchematic image of a nanocone and a calculated band gap structure of Si. A schematic image of a nanocone with a gradually increasing band gap from a substrate up to the tip of cones (a) and a calculated band gap structure of Si as function of the nanowire’s diameter (b).Back to article page