PvdfFilm Photovoltaics CuFoil chemical_compound WS2 Sperm MfmAmplitude SmalScan MechanicalProperty LiIonBattery Conductive AFM Hexatriacontane Change CHRYSALIS_INC Techcomp #EC piezoelectric force microscopy TemperatureControllerAFM PetruPoni University_of_Regensburg Roughness HighAspect C_AFM Silicon ReflexLens strontiu_titanate atomic_steps PhaseImaging Mechanical Metal Multiferroic_materials I-VSpectroscopy Pore DNAProtein SKKU