Glass StainlessSteel HardDisk Graphene ForceVolumeImage optoelectronics Galfenol Water AAO Foil tip_bias_mode Photovoltaics TiO2 Phenanthrene ferromagnetic SmalScan Hexatriacontane LateralForce amplitude_modulation IVSpectroscopy ScanningSpreadingResistanceMicroscopy MLCC Step ScanningThermalMicroscopy Chungnam_National_University NUS_Physics DLaTGS alkanes FM-KPFM layers SICM Polyvinylidene_fluoride EPFL Conductive AFM Materials