Highly ordered structural organization of organic semiconductor monolayers on HOPG and Au(111) - STM studies of alkylphenyl N-substituted perylene diimide at liquid-solid interface

► Self-organization of perylene diimide on HOPG and Au(111) was compared. ► Monolayers of two different structures have been distinguished on HOPG. ► The monolayer of tilted molecules is controlled by π stacking type interactions.