MagneticForce Barium_titanate PhaseChange Friction Step Hair BTO Annealing HighAspect CrossSection PUR Phase DOE Lateral_Force_Microscopy UnivMaryland HfO2 MESA structure PyroelectricDetector Mechinical HanyangUniv PVAP3HT Mapping Organic tip_bias_mode Silver Calcite TappingMode SurfaceChange NUS_Physics non_contact Imprint Boundary Perovskite CarbonNanotube Reduction