Impact induced chemisorption of C-20 isomers on diamond (001)-(2 x 1) surface

The adsorption of low-energy C-20 isomers on diamond (0 0 1)-(2 x 1) surfac e was investigated by molecular dynamics simulation using the Brenner poten tial. The energy dependence of chemisorption characteristic was studied. We found that there existed an energy threshold for chemisorption of C-20 to occur. Between 10 and 20 eV, the C-20 fullerene has high probability of che misorption and the adsorbed cage retains its original structure, which supp orts the experimental observations of memory effects. However, the structur es of the adsorbed bowl and ring C-20 were different from their original on es. In this case, the local order in cluster-assembled films would be diffe rent from the free clusters. (C) 2001 Elsevier Science B.V. All rights rese rved.