Phthalocyanine piezoelectric force microscopy Lattice Aggregated_molecules fluorocarbon Chungnam_National_University PS_LDPE China FAFailureAnlaysis PolyimideFilm Vacuum PhaseChange AlkaneFilm atomic_layer Conduct OpticalWaveguide Sphere HexagonalBN Carbon FrictionalForceMicroscopy FFM Multiferroic_materials EvatecAG FrictionForce DNAProtein Sadowski PVA self-assembled_monolayer Bacteria Growing STM Pinpoint PFM SSRM Phase Semiconductor