ferromagnetic Ceramic Hydroxyapatite Bacterium Terrace layers Bacteria EPFL BismuthFerrite SICM semifluorinated alkane PrCurve HexagonalBN Scratch Memory Phase LateralForceMicroscopy Mechanical ReflexLens GaN Device Zhi cannabis MechanicalProperties hetero_structure Hole HexacontaneFilm Ceramics Topography ThermalConductivity BloodCell NCM light_emitting AtomicSteps LFM