Insulator Pinpoint PFM self_assembly Modulus HexagonalBN Silicon Mechanical&nanotechnology Nanofiber NTU mfm_amplitude Ito Ecoli Melt CeramicCapacitor Vanadate Ca10(PO4)6(OH)2 Ni-FeAlloy DNA StrontiuTitanate Gallium_Arsenide Scratch Composite mechanical property electrospinning PiezoelectricForceMicroscopy Galfenol Chloroform Platinum MultiLayerCeramicCapacitor Domain PFM TemperatureControl HanyangUniv Oxidation Optic