Fluorinated diamond-like carbon (F-DLC) represents a specialized category of DLC coatings that incorporates fluorine atoms into the carbon matrix, resulting in unique surface properties including high water repellency, low surface energy, and exceptional tribological performance. While representing a smaller share of the overall DLC market compared to hydrogenated and ta-C variants, F-DLC is gaining significant traction in biomedical devices, antibiofouling surfaces, and applications requiring super-lubricity.

The incorporation of fluorine into DLC films dramatically alters their surface energy and wettability. F-DLC films tend to have low wettability and good mechanical flexibility, making them particularly valuable for biomedical devices and antibiofouling surfaces . Research has demonstrated an environmentally friendly and scalable method to create fluorine-doped diamond-like carbon (F-DLC) coatings using plasma immersion ion implantation plasma-enhanced chemical vapor deposition (PIII-PECVD) with 1,1,1,2-tetrafluoroethane . This approach enables the deposition of F-DLC coatings with tailored surface energy characteristics.

One of the most remarkable properties of F-DLC is its potential for super-lubricity. While hydrogen-terminated DLC may be more lubricious than pure carbon DLC, fluorinated DLC can be super lubricious with a frictional coefficient less than that of engine oil (0.01) . This extremely low friction coefficient opens up applications in precision mechanical systems, micro-electromechanical systems (MEMS), and other devices where minimizing energy loss due to friction is critical. F-DLC coatings also exhibit high hardness, with hydrogen-free fluorinated DLC films prepared using T-shape filtered arc deposition systems showing excellent mechanical properties .

The biomedical applications of F-DLC are particularly promising. The low surface energy and high water repellency of F-DLC coatings reduce protein adsorption and cell adhesion, making them ideal for blood-contacting devices, catheters, and implants where thrombus formation and biofouling are significant concerns. Research has also demonstrated that fluorine-doped DLC coatings can improve the corrosion behavior of cobalt-chromium-molybdenum substrates used in orthopedic implants . As the medical device industry continues to demand advanced surface solutions for biocompatibility and longevity, F-DLC coatings are positioned for significant growth.

For more information on fluorinated DLC coatings, visit Diamond Like Carbon Market Report.