“…C 60 molecules form various self-assembled structures when deposited on different types of substrate, such as Au [4][5][6][7][8][9], Ag [10][11][12][13][14], Cu [15,16], Pb [17], Pd [18], P [19], Al [20], graphene [21][22][23][24], WSe 2 [25], Si [26][27][28][29], and Ge [30][31][32]. Many results indicate that C 60 molecules are easy to nucleate at the terrace edge and may form a close-packed structure under appropriate conditions, regardless of the types of substrate, such as the 2 √ 3 × 2 √ 3 R30 • domain on Au(111) [33,34] and the 4 × 4 superstructure on graphene/Cu(111) [22].…”