Novel superstructures of alkali-doped C60 films on Cu(111) and Ag(111) surfaces
Journal
Surface Review and Letters
Journal Volume
14
Journal Issue
4
Pages
739-743
Date Issued
2007
Author(s)
Abstract
We report a scanning tunneling microscopy (STM) study of potassium ( K )-doped C 60 ( K x C 60 ) on Cu (111) and Ag (111), with focus on the observation of novel K -induced superstructures. On Cu (111), K -intercalation leads to various superstructures, i.e., p(3 × 3), p(2 × 2), and a disordered "maze-like" structure. Concomitant removal of C 60 -induced substrate reconstruction was also observed. On Ag (111), K -doping induces C 60 reorientation and results in a p(2 × 2) superstructure. All observed superstructures suggest intrinsic inhomogeneity of K -doping in fullerene materials, which must be further understood.
Type
conference paper