ConductiveAFM Switching MultiferroicMaterials Polytetrafluoroethylene Bmp Piranha GalliumPhosphide AdhesionForce food LateralForce Transparent pinpoint mode STM TCS PolyvinylideneFluoride IcelandSpar PolymerPatterns Copper StrontiuTitanate FrequencyModulation Pvdf SKKU Steps PetruPoni_Institute exfoliate flakes Hydroxyapatite Device ContactMode Monisha Ferrite Mosfet Grain ImideMonomer Terrace