Stearic acid self-assembled molecules on the HOPG surface.  Measurements were carried out in liquid-solid interface. The left image was obtained with Solver P47 Pro SPM, the right image - using the STM scanning measuring head (SFS012).

Image courtesy of Hiroshi Uji-i.
The sample was kindly given by  Hiroshi Fukumura, Tohoku University, Department of Chemestry.