Abstract
We have studied one-dimensional cluster formation of and along the step of the Cu(111) 1×1 surface using a scanning tunneling microscope. It is found that the dimer is most abundant only for which has one unpaired electron delocalized over the carbon cage, while the monomer is dominant in the cases of and It was concluded that the preferential dimer formation of is mainly due to the interaction between the unpaired electrons. The interaction energy among fullerence molecules was estimated based on Walton’s cluster theory.
- Received 3 June 1997
DOI:https://doi.org/10.1103/PhysRevB.56.6470
©1997 American Physical Society