PtfeFilter Biofilm STO Titanate Polyimide MolecularSelfAssembly PMNPT Polypropylene Sulfur Austenite MagneticArray Piezoresponse medical FFM SKKU LaAlO3 Copper biocompatible Formamidinium_lead_iodide ScratchMode NCM PiezoelectricForceMicroscopy ContactMode Dopped small_scan Vanadate Crystal Defects Device PinpointNanomechanicalMode Granada Lateral Butterfly Aggregated_molecules NTU