CompactDisk GaN ScanningKelvinProbeMicroscopy CuSubstrate graphene_hybrid WWafer SiliconCrystal cross section polyvinyl acetate Alkane NusEce 3-hexylthiophene CopperFoil NtuEee dichalcogenide Steps FM_KPFM EFMAmplitude CarbonNanotube ContactMode PolyvinylAcetate Pore LightEmiting INSPParis thermoplastic_elastomers Roughness CrossSection LateralForceMicroscopy Perovskite Array AEAPDES lift_mode VerticalPFM LiIonBattery Lateral_Force_Microscopy