Preliminary comparative study of laser-prepared DLC and Cr-doped DLC for bacteria adhesion

摘要

Diamond-like carbon (DLC) and Cr-doped DLC (chromium content 0-18 at.%) layers were deposited by dual pulsed laser ablation. The composition was analyzed using electron probe X-ray microanalysis with wavelength-dispersive spectrometers. Carbon and chromium bonds were determined by X-ray photoelectron spectroscopy. Ethylene glycol, diiodomethane and deion-ized water were used to measure contact angles and for the calculation of the surface free energy (SFE). Antibacterial properties were studied using gram positive and negative bacteria. The influence of the SFE, hydrophobicity, surface roughness and the zeta potential on antibacterial properties of doped layers was discussed. The relationships between physical and bio-properties are discussed.