hydrocarbon fluoroaalkane Phenanthrene HexagonalBN PolyvinylideneFluoride medical NCM Mfm 2d_materials Water FrictionalForce molecules CarbonNanotube SiliconeOxide Gong Silicon ShenYang Monisha Current Indent multi_layer Roughness TiO2 Vinylpyridine Formamidinium_lead_iodide Ni-FeAlloy HBN BoronNitride self_assembly temperature controller AFM Leakage Conductance LiquidCrystal Melt fluoroalkane