membrane PVA domain_switching vertical_PFM GaN STM MagneticForce Roughness ScanningKelvinProbeMicroscopy HumanHair KPFM Morphology Laser Self-assembledMonolayer DomainSwitching Zhi Chungnam_National_University TriGlycineSulphate HACrystal graphene_hybrid TungstenThinFilmDeposition Non-ContactMode Ceramics Yttria_stabilized_Zirconia Nanotechnology cannabinoid LiquidImaging TransitionMetal Ni81Fe19 kelvin probe force microscopy IRDetector OpticalWaveguide HexagonalBoronNitride Boron Vacuum