FrictionalForce strontiu_titanate India Annealing ScanningTunnelingMicroscopy Sapphire SingleCrystal mechanical_property SetpointMode SrTiO3 Vanadate SKKU Flake PolyvinylideneFluoride FastScan Monisha Annealed CeramicCapacitor bias_mode Piranha Optical Varistor GlassTemp Ni81Fe19 MLCC C_AFM Sic Fujian Liquid AM-KPFM BlockCopolymer AtomicSteps FFM Sperm LaAlO3