PtfeMembrane LiftMode PetruPoni lift_mode HumanHair semifluorinated_alkanes EFM Hexatriacontane ThermalConductivity silicon_carbide Electrical&Electronics Oxide Floppy gallium_nitride BTO heterojunctions HexagonalBN Phenanthrene MembraneFilter align Vac Sidewall Strontium Fluoride Beads thermal_conductivity fluoroaalkane fluoroalkane molecular_beam graphene_hybrid single_layer Epoxy frequency_modulation Permalloy Optical