Chemical modification of carbon films with fluorine functionalities using dry process

Photolysis of perfluoroazooctane in the presence of carbon films, such as diamond-like carbon and diamond films, led to a covalent modification of their surface to introduce perfluorooctyl functional groups using dry process, confirmed by X-ray photoelectron and Raman spectroscopy. The carbon films modified with fluorine moieties showed a reduction of surface energy evaluated by contact angle to water and oil compared with pristine carbon films, and chemical stabilities due to the covalent modification.

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► Photochemical modification of diamond-like carbon and diamond films with perfluorooctyl functional groups using dry process.
► The modified carbon films with fluorine moieties show water and oil repellent properties.
► Chemical stabilities due to the covalent modification.