flakes polymeric_arrays AM-KPFM Vortex BreastCancerCell Spain Tin sulfide non_contact PFM Mfm Annealing HexagonalBoronNitride Boundary Polarization DiffractiveOpticalElements FFM Epoxy ito_film SICM Bio LiquidImaging Litho Molybdenum LateralForceMicroscopy Au111 ConductiveAFM IndiumTinOxide Filter PtfeFilter Hexatriacontane Fluoride Polydimethylsiloxane HexagonalBN Temasek_Lab Step