PvdfBead Reduction Fe_film biocompatible Ptfe Non-ContactMode SAM Implant Scratch Nanostructure NUSNNI AlkaneFilm Polystyrene SingleCrystal Ceramics Self-assembledMonolayer Aluminium_Oxide ring shape Adhesion ItoGlass PvdfFilm hetero_structure PMNPT Wang Subhajjit Iron Etch LifeScience IcelandSpar LiquidCrystal Vortex cross section Modulus Domain Formamidinium_lead_iodide