The defect structures of fullerenes and fullerene-like clusters, produced by two C60 molecules colliding at various rates and directions (with energies ranging from 50 to 600eV) were studied by using molecular dynamics simulations. The electronic structures around the defects were deduced by using a self-consistent field Hartree-Fock scheme. The results showed that the coordination-number defects obeyed a magic-number rule, and that the numbers of rings which formed the closed-cage structure of the fullerene or fullerene-like products could be closely described by a modified form of Euler's theorem. The electronic structures around the defects were substantially changed when compared with those of C atoms on normal fullerene cages.

Y.Xia, Y.Mu, Y.Xing, C.Tan, L.Mei: Physical Review B, 1997, 56[8], 4979-86