semifluorinated_alkanes Force-distance suspended_graphene fluorocarbon Hexatriacontane membrane PtfeFilter Leakage AmplitudeModulation Sulfur Dr.JurekSadowski ThermalDetectors blended polymers UnivCollegeLondon Solution TungstenDeposition Roughness CVD Nanofiber Plug Inorganic_Compound bias_mode Cross-section Annealing CastIron H-BN Fujian Temasek_Lab Cell Self-assembledMonolayer Vortex Ananth Polyimide Nanostructure ring shape