Figure 6.

a The eight important sites of Ge atom adsorption on (2 × 2)/(3 × 3) Pb/Cu(111) surface, and the green parallelogram shows one super cell; b the total energies and c the binding energies of the eight important adsorption systems of Ge atom on (2 × 2)/(3 × 3) Pb/Cu(111) surface

Wang et al. Nanoscale Research Letters 2010 5:1020-1026   doi:10.1007/s11671-010-9595-0