UnivCollegeLondon Floppy WWafer Pores Chloroform vertical_PFM Oxidation margarine Titanate Wonseok high_resolution Hole hetero_structure AM_KPFM Graphene Conductive AFM Reduction Lateral_Force_Microscopy YttriaStabilizedZirconia VortexCore Ferrite #Materials 2-vinylpyridine multi_layer SThM ito_film Tapping Mechanical&nanotechnology flakes Non-ContactMode Layer hydrocarbon Ceramic GalliumPhosphide self_assembly