semifluorinated alkane HanyangUniv PtfeFilter CuParticle Lateral SFAs MagneticForceMicroscopy I-VSpectroscopy high_resolution Conductive AFM Polyethylene NeodymiumMagnets ForceVolumeMapping SiliconOxide Hair UnivCollegeLondon CBD MoS2 Ni81Fe19 Polyurethane Piezoresponse Pyroelectric Hole VerticalPFM MESA structure polymeric_arrays PhaseTransition Ferrite Domain StainlessSteel Protein Liquid SiliconeOxide block_copolymer Formamidinium_lead_iodide