I-VSpectroscopy ScanningKelvinProbeMicroscopy graphene_hybrid TCS ForceMapping PS_PVAC Lattice CrAu NUSNNI WS2 plastic Lateral InLiquid Christmas DeflectionOptics suspended_graphene PyroelectricDetector phase_change Chungnam_National_University GaP Piranha Adhesion StyreneBeads Film FrictionalForce Formamidinium_lead_iodide Galfenol Defects AM_SKPM small_scan Force-distance PDMS InsulatorFilm IndiumTinOxide CarbonNanotube