ring shape Mechinical TiO2 LateralPFM plastic mono_layer Gallium_Arsenide HexagonalBoronNitride light_emitting Piezoresponse domain_switching Device Sic ito_film PyroelectricDetector phase_change Hafnia VinylAlcohol NusEce Wonseok LateralForceMicroscopy Sphere fluorocarbon NCM\ flakes Regensburg Protein Solar ForceVolume molecular_self_assembly fluoroalkane Electical&Electronics LiftHeight TransitionMetal Gong