fluorocarbon align LDPE LeakageCurrent Crystal Pvdf Optical Corrosion Forevision LateralForceMicroscopy Protein KPFM OpticalModulator EPFL Bacterium NanoLithography FrictionalForceMicroscopy Chromium Steps Fluoride GaN HighAcpectRatio HexacontaneFilm ElectroChemical Hexatriacontane Organic Tapping Galfenol self_assembly BoronNitride PetruPoni block_copolymer TransitionMetal cross section single_layer