Nucleation and Growth Characteristics of Metal Films on C_(60)(111)Surface

C_(60) single crystals oriented at[111]about 1μm in size,were grown in C_(60) film on NaCl(001)substrate.Bilayer films of nickel,gold,silver,and indium over C_(60) on NaCl substrate prepared by vacuum deposition method were studied with a transmission electron microscope.It was found that for different kinds of metals,their nucleation and growth characteristics on C_(60) (111)surface are quite different.This phenomenon is mainly attributed to different activation energies of the four metals.Analyses of the experimental results indicate that the activation energies of Ni,Au,Ag,and In adatoms on C_(60) (111)surface change in a descent order.