PetruPoni_Institute Pinpoint PFM Vanadate Tape InsulatorFilm Semiconductor Pyroelectric Roughness MLCC CalciumHydroxyapatite Typhimurium PatternedSapphireSubstrat PVAP3HT OpticalWaveguide China SPMLabs Ucl Tapping WWafer Piezoelectric Magnets Morphology Anneal molecular_beam Ca10(PO4)6(OH)2 vertical_PFM layers MoirePattern NTU Friction Inorganic ItoGlass conductive Ptfe Forevision