title: Chromium-doped DLC for implants prepared by laser-magnetron deposition.
abstract: Diamond-like carbon (DLC) thin films are frequently used for coating of implants. The problem of DLC layers lies in bad layer adhesion to metal implants. Chromium is used as a dopant for improvement of adhesion of DLC films. DLC and Cr-DLC layers were deposited on silicon, Ti6Al4V and CoCrMo substrates by a hybrid technology using combination of pulsed laser deposition (PLD) and magnetron sputtering. The topology of layers was studied using SEM, AFM and mechanical profilometer. Carbon and chromium content and concentration of trivalent and toxic hexavalent chromium bonds were determined by XPS and WDS. It follows from the scratch tests that Cr doping improved adhesion of DLC layers. Ethylene glycol, diiodomethane and deionized water were used to measure the contact angles. The surface free energy (SFE) was calculated. The antibacterial properties were studied using Pseudomonas aeruginosa and Staphylococcus aureus bacteria. The influence of SFE, hydrophobicity and surface roughness on antibacterial ability of doped layers is discussed.
authors.affiliation: Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic; Czech Technical University in Prague, Faculty of Biomedical Engineering, nam. Sitna 3105, 27201 Kladno, Czech Republic. Electronic address: jelinek@fzu.cz.
authors.forename: Miroslav
authors.initials: M
authors.lastname: Jelinek
authors.affiliation: Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic; Czech Technical University in Prague, Faculty of Biomedical Engineering, nam. Sitna 3105, 27201 Kladno, Czech Republic.
authors.forename: Tomáš
authors.initials: T
authors.lastname: Kocourek
authors.affiliation: Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic.
authors.forename: Josef
authors.initials: J
authors.lastname: Zemek
authors.affiliation: Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic; Czech Technical University in Prague, Faculty of Biomedical Engineering, nam. Sitna 3105, 27201 Kladno, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Mikšovský
authors.affiliation: Institute of Experimental Medicine ASCR, Vídeňská 1083, 14220 Praha 4, Czech Republic.
authors.forename: Šárka
authors.initials: Š
authors.lastname: Kubinová
authors.affiliation: Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic; Czech Technical University in Prague, Faculty of Biomedical Engineering, nam. Sitna 3105, 27201 Kladno, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Remsa
authors.affiliation: Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic.
authors.forename: Jaromir
authors.initials: J
authors.lastname: Kopeček
authors.affiliation: Institute of Physics AS CR, Na Slovance 2, 182 21 Praha 8, Czech Republic.
authors.forename: Karel
authors.initials: K
authors.lastname: Jurek
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002857:Chromium / Q000737:chemistry*; D007834:Lasers
chemical_list: D002857:Chromium; D002244:Carbon
keywords: Adhesion; Antibacterial properties; Chromium; DLC; Hybrid PLD; Toxicity