HanyangUniv LiIonBattery Regensburg MonoLayer SiWafer PhaseImaging Co/Cr/Pt Organic HfO2 P3HT NUS_Physics Sio2 HOPG Zhi amplitude_modulation PtfeMembrane GaN GaAs BismuthVanadate H-BN Ito SingleCrystal GalliumPhosphide PolyvinylideneFluoride Mfm Scratch Typhimurium Protein high_resolution NTU Polytetrafluoroethylene DentalProsthesis Butterfly PiezoelectricForceMicroscopy nanomechanical