Copolymer thermoplastic_elastomers heterojunctions Gong Lift Optical AtomicSteps Ptfe #Materials Vanadate BiFeO3 Nanotechnology AEAPDES Sapphire lift_mode Stiffness Celebration Pores PolyvinylAcetate AM_KPFM Yttria_stabilized_Zirconia Sic Singapore MagneticPhase Electical&Electronics piezoelectric force microscopy STM PVAP3HT SFAs LateralForce Collagen Mfm NeodymiumMagnets LDPE Piezoresponse