Hydroxyapatite ring shape Insulator MechanicalProperties Bacteria Ferrite Optic AAO ScanningIon-ConductanceMicroscopy Bio cross section Scanning_Thermal_Microscopy Writing Aluminium_Oxide ShenYang Silicon MESA structure PVA BaTiO3 Molybdenum_disulfide Korea BismuthFerrite India SelfAssembly UTEM vertical_PFM Collagen phase_change Workfunction Dopped EFMAmplitude gallium_nitride Film silicon_carbide ScanningKelvinProbeMicroscopy