PhaseImaging TappingMode Calcium Vortex ScratchMode PatternedSapphireSubstrat FailureAnalysis dielectric_trench F14H20 IIT-chennai YszSubstrate TiO2 Pores Tapping LateralPFM Magnets STO OxideLayer BariumTitanate self-assembly electrospinning CHRYSALIS_INC MESA structure Lateral_Force_Microscopy silicon_oxide MechanicalProperty TipBiasMode SSRM bias_mode Deposition Composite Electrical&Electronics Cancer dielectric trench Trench