membrane GaN Adhesion Floppy PinpointPFM BCZT PDMS MetalCompound Steps ForceVolumeMapping UnivCollegeLondon HACrystal MultiLayerCeramicCapacitor OpticalModulator Optical Potential medical HardDisk ConductiveAFM tip_bias_mode self-assembly NCM\ MechanicalProperty hetero_structure Corrosion NUS_NNI_Nanocore Growth Tape Polystyrene Biofilm GranadaUniv Mechinical ElectrostaticForceMicroscopy Wonseok ThermalConductivity