Trench Lateral_Force_Microscopy Gallium_Arsenide Bismuth HiVacuum Pinpoint PFM Pvdf nanobar MembraneFilter SiliconOxide Terrace molecules Graphite India DeflectionOptics WS2 molecular_beam temperature controller AFM MBE FFM MfmPhase MoS2 suspended_graphene align TransitionMetal AM_SKPM Ananth Metal YttriaStabilizedZirconia NUSNNI MeltingPoint Ferrite ContactModeDots Magnetic Force Microscopy KAIST