Pattern transition from nanohoneycomb to nanograss on germanium by gallium ion bombardment*
Zheng Xiao-Hua), Zhang Miaoa), Huang An-Pingb), Xiao Zhi-Songb), Paul K Chuc), Wang Xia), Di Zeng-Fenga)†
       
(a) Comparison of AFM morphologies between the irradiated and control (not irradiated) samples. (b) Line scan acquired along the dashed line marked in panel (a). (c) Schematic diagram illustrating the morphorlogical evolution from the ordered honeycomb structure to nanograss.