Graphene Hair Gong Techcomp CaMnO3 fe_nd_b molecular_beam Array Composition PhaseImaging Adhesion Pores layers FFM fluorocarbon Semiconductor Patterns CNT Flake STO Cobalt-dopedIronOxide Nanotechnology 2d_materials Au111 Ucl MolecularSelfAssembly PatternedSapphireSubstrat SetpointMode Lift amplitude_modulation Ferroelectric Solution Stiffness PhaseChange AdhesionForce