Chromium-doped DLC for implants prepared by laser-magnetron deposition
Language English Country Netherlands Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25492001
DOI
10.1016/j.msec.2014.10.035
PII: S0928-4931(14)00655-9
Knihovny.cz E-resources
- Keywords
- Adhesion, Antibacterial properties, Chromium, DLC, Hybrid PLD, Toxicity,
- MeSH
- Chromium chemistry MeSH
- Lasers MeSH
- Carbon chemistry MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Chromium MeSH
- Carbon MeSH
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.
Institute of Experimental Medicine ASCR Vídeňská 1083 14220 Praha 4 Czech Republic
Institute of Physics AS CR Na Slovance 2 182 21 Praha 8 Czech Republic
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