Tuning the morphological and electrical properties of graphite surface by self-assembled viologen nanostructures

•A robust functionalization of graphitic surface by self-assembly of reduced viologens•Functionalized surfaces were characterized by Scanning Tunneling Microscopy, Atomic Force Microscopy and Voltammetry•π-π interactions control the stacked configuration•The local contact potential difference was scanned by Kelvin Probe Force Microscopy