Perovskite TappingMode MESA structure Corrosion SPMLabs ring shape mechanical property DeoxyribonucleicAcid ForceMapping Chromium PtfeMembrane lift_mode Gold Multiferroic_materials F14H20 Moire dielectric trench Sperm conductive OrganicCompound SThM Formamidinium_lead_iodide HardDiskMedia FrictionalForce LightEmission Electrode ForceVolumeMapping ForceDistanceSpectroscopy StyreneBeads Ferrite ULCA Vacuum LDPE thermoplastic_elastomers BCZT