Collagen PhaseImaging tip_bias_mode Flake SKKU IIT-chennai PVAP3HT cannabidiol Biology Electronics temp Cross-section Tin disulfide norganic PetruPoni_Institute EvatecAG Ferrite #Materials ring shape Lateral_Force_Microscopy BTO molecular_beam Domain MagneticArray silicon_carbide SmalScan DomainSwitching Etch organic_polymer Polyvinylidene LiftMode PtfeFilter Kevlar PECurve Hafnium_dioxide