Pvdf biocompatible KAIST Roughness Cell Fet dichalcogenide InsulatorFilm Protein Non-ContactMode Fendb margarine WWafer Sulfur Annealed BariumTitanate Nickel FrictionForce Sapphire AM-KPFM LithiumNiobate Grain Optic HexagonalBN Crystal Blend cross section Sadowski Platinum PVAC cannabinoid FM_SKPM UnivOfMaryland Aggregated_molecules TungstenDeposition