Figure 4.

Empty-state STM images showing Ni-containing structures on Ag/Ge (111)-√3 × √3 surface. (a) Triple-hole defects which appear after annealing between 470 and 570 K. (b) Long islands (enclosed by circles) which appear after annealing above 670 K. (c) Zoomed long island with a corresponding schematic diagram of Ag/Ge(111)-√3 × √3 surfaces in which three directions for island growth are indicated.

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