Ion beam deposition of DLC and nitrogen doped DLC thin films for enhanced haemocompatibility on PTFE

► DLC and DLC:N have been synthesized on PTFE using ion beam deposition. ► Low level of N doping improved mechanical properties and surface smoothness of DLC. ► DLC coating decreased the surface energy and improved the wettability of PTFE. ► Platelets on the DLC and DLC:N were much less aggregated and activated. ► DLC and DLC:N coatings significantly enhanced the haemocompatibility of PTFE.