piezoelectric force microscopy medical SiliconeOxide Phthalocyanine Hydroxyapatite Adhesive SingleCrystal Stiffness 3-hexylthiophene #Materials Ecoli DNAProtein polyvinyl acetate LiftMode Imprint LiquidCell PhaseTransition PetruPoni AM-KPFM SmalScan Jason Alloy Polyimide DiffractiveOpticalElements pinpoint mode Writing Adhesion Strontium Monisha OpticalWaveguide bias_mode SurfaceOxidation SKPM BismuthVanadate AmplitudeModulation