alkanes Imprint Trench PS_PVAC Steps C60H122 MfmAmplitude ChemicalCompound Sidewall molecular_beam Step ShenYang CaMnO3 PvdfFilm Morphology margarine Anneal LiNbO3 AtomicSteps Silver 2d_materials ScanningTunnelingMicroscopy NanoLithography Tapping GranadaUniv GalliumPhosphide LightEmission mechanical property Vacuum CuSubstrate Alkane KPFM FM-KPFM ElectrostaticForceMicroscopy LaAlO3