Dental Conductivity NTU TempControl Annealed biocompatible PtfeMembrane tip_bias_mode Nickel Mapping ConductiveAFM AdhesionEnergy CaMnO3 Cross-section MonoLayer Pyroelectric PVA PhaseTransition Worcester_Polytechnic_Institute ContactMode C_AFM organic_polymer Bmp LateralPFM #EC Lateral_Force_Microscopy Protein PpLdpe Polyvinylidene molecules Al2O3 Granada SPMLabs Wonseok plastic