Figure 1.

The average energies for the [(n − 1) × (n − 1)]/(n × n) Pb bilayer/Cu(111) (n = 2,3,…, 12) structures. The dark(big) and red(small) balls are for Pb and Cu atoms, respectively

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