kelvin probe force microscopy MultiferroicMaterials Epoxy PS_PVAC China Annealing Optical Oxide light_emission Polarization SingleCrystal HighResolution dielectric_trench PpLdpe ThermalProperties Biofilm Hafnium_dioxide BCZT Terrace Optoelectonics Mobile FrictionForce DomainSwitching TemperatureControlledAFM Pores Pattern ForceVolumeImage mechanical property MechanicalProperties India cooling SetpointMode HBN Morphology lift_mode