  Assembling clusters on surfaces has emerged as a novel way to grow thin films
with targeted properties. In particular, it has been proposed from experimental
findings that fullerenes deposited on surfaces could give rise to thin films
retaining the bonding properties of the incident clusters. However the
microscopic structure of such films is still unclear. By performing quantum
molecular dynamics simulations, we show that C_28 fullerenes can be deposited
on a surface to form a thin film of nearly defect free molecules, which act as
carbon superatoms. Our findings help clarify the structure of disordered small
fullerene films and also support the recently proposed hyperdiamond model for
solid C_28.
