The interaction of C60 molecules with the Si (111)-(7x7) is complex but generally very strong . The Si (111)H-(1x1) however binds C60 through much weaker van der Waals inter-action  only. We discuss both molecule-surface systems and experimental results of the manipulation of C60 on these surfaces by means of an STM tip. The differences in interaction strength might also be useful in developing novel molecular manipulation procedures.
D. Sánchez-Portal et al., Surf. Sci. 482-485, 39 (2001)
H. Takashima, J. Crystal Growth 227-228, 825 (2001)