The interphase electrolyte/HOPG was monitored with the AFM in tapping mode silicon nitride tips covered with Pt (HQ:NCS18/Pt), having force constant 5 N/m, and resonance frequency 75 kHz. A resonance frequency of 21 kHz was chosen when the cantilever is immersed in the electrolyte. The image capture took around 260 seconds and the analysis was performed using the software Gwyddion 2.4. Each image was taken immediately after the electrochemical measurement, and the solution flow was interrupted during the image capture in order to optimize its quality.