Antibacterial metal ion release from diamond-like carbon modified surfaces for novel multifunctional implant materials

The aim of this study was the synthesis of hard and low-abrasive novel implant materials with built-in time-dependent antibacterial properties, which can be tailored by a well-defined time-dependent and finite release of metal ions. We were able to synthesize such smart implant surfaces employing EC...

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Bibliographic Details
Published in:Journal of materials research 2016-09, Vol.31 (17), p.2571-2577
Main Authors: Buchegger, Sascha, Vogel, Caroline, Herrmann, Rudolf, Stritzker, Bernd, Wixforth, Achim, Westerhausen, Christoph
Format: Article
Language:English
Subjects:
Antiinfectives and antibacterials
Antimicrobial agents
Applied and Technical Physics
Biocompatibility
Biomaterials
Chemical synthesis
Cytotoxicity
Diamond-like carbon
Diamond-like carbon films
Ethanol
Experiments
Infections
Inorganic Chemistry
Ions
Kinetics
Materials Engineering
Materials research
Materials Science
Mathematical analysis
Mathematical models
Metal ions
Nanoparticles
Nanotechnology
Plasma
Polymers
Protective coatings
Studies
Time dependence
Titanium alloys
Transplants & implants
Wear resistance
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Summary:The aim of this study was the synthesis of hard and low-abrasive novel implant materials with built-in time-dependent antibacterial properties, which can be tailored by a well-defined time-dependent and finite release of metal ions. We were able to synthesize such smart implant surfaces employing ECR (electron cyclotron resonance)-plasma on typical titanium implant material by transforming a polymer film into diamond-like carbon (DLC) which contains metal nanoparticles as reservoirs for controlled metal ion release. We found that the amount of released antibacterial metal ions is a biexponential function of time with a high release rate during the first few hours followed by a decreased ion release rate within the following days. To describe our experimental findings, we developed a kinetic model assuming that both nanoparticles near the surface and nanoparticles in the DLC bulk contribute to the total amount of ions released with different time constants.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2016.275