Figure 5.

Empty-state STM images showing Ni-containing structures. (a) Hexagonal island on Ge(111)-c(2 × 8) surface. (b) Hexagonal island on Ag/Ge(111)-√3 × √3 surfaces. (c) 7 × 7 island on Ge(111)-c(2 × 8) surface. (d) 7 × 7 island on Ag/Ge(111)-√3 × √3 surfaces. The notations in left upper corners represent the specified structures.

Fu et al. Nanoscale Research Letters 2013 8:416   doi:10.1186/1556-276X-8-416
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