BismuthVanadate PS_PVAC Oxide NTU Melt Gong PhaseTransition Wang Polytetrafluoroethylene BloodCell MultiferroicMaterials NUS Wafer Varistor LDPE MagneticForceMicroscopy Bio Ram Morphology Blood SelfAssembly BTO PhaseChange temperature controller AFM Hydroxyapatite cooling DiffractiveOpticalElements Alloy doped LithiumNiobate TransitionMetal align EFM Nanotechnology Pyroelectric