Observation of zigzag and armchair edges of graphite using scanning tunneling microscopy and spectroscopy
Observation of zigzag and armchair edges of graphite using scanning tunneling microscopy and spectroscopy
The presence of structure-dependent edge states of graphite is revealed by both ambient- and ultra-highvacuum- (UHV) scanning tunneling microscopy (STM) / scanning tunneling spectroscopy (STS) observations. On a hydrogenated zigzag (armchair) edge, bright spots are (are not) observed together with (SQRT(3) by SQRT(3))R30 superlattice near the Fermi level (V_S = …