Antibacterial property of DLC film coated on textile material

To evaluate the antibacterial property for diamond-like carbon films (DLC), DLC films were coated on textile material (cotton fibres) using a plasma-based ion implantation (PBII). Raman spectra show the DLC films were successfully coated on the cotton fibres. An antibacterial property of DLC film against two types of bacteria (Staphylococcus aureus, and Klebsiella pneumoniae) was investigated by the standard evaluation technique International Organization for Standardization (ISO) 20743. After incubation for 18 h, the number of cell colonies of the normal cotton fibres increased 100 times more than that of the initial condition. In contrast with the cotton fibres with DLC coating, no active bacteria could be observed after incubation for 18 h. X-ray photoelectron spectroscopy confirms that DLC coating formed C–H bond on cotton surface. Consequently, DLC film coating is a promising method to inhibit the increase of active bacteria. The DLC coatings are expected for biomedical applications with antibacterial property for coating of the commercial items.