HanyangUniv ForceMapping PDMS Bacterium Polyvinylidene InorganicCompound BismuthFerrite Blend Adhesive Chungnam_National_University tip_bias_mode FrictionForce Spain Memory NUS_NNI_Nanocore FuelCell Gong flakes TungstenThinFilmDeposition TemperatureControllerStage Reduction Ni-FeAlloy Collagen PvdfFilm NUS ForceVolumeImage Alloy oxide_layer Multiferroic_materials MultiferroicMaterials fluorocarbon Regensburg polyvinyl acetate LateralPFM mechanical_property