Doped diamond-like carbon coatings prepared by hybrid deposition systems for biomedical application

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21460%2F21%3A00356664" target="_blank" >RIV/68407700:21460/21:00356664 - isvavai.cz</a>

Result on the web

<a href="http://imbm.fbmi.cvut.cz/soubory/Sborniky/IMBM%202021" target="_blank" >http://imbm.fbmi.cvut.cz/soubory/Sborniky/IMBM%202021</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Doped diamond-like carbon coatings prepared by hybrid deposition systems for biomedical application

Original language description

Nowadays there are materials having excellent properties for use in medicine (DLC, TiO2, HA, ...). DLC is a metastable form of amorphous carbon containing bonded carbon atoms of sp2 and sp3 hybridized orbital. DLC layers are semiconductors with high mechanical hardness, chemical inertness, low coefficient of friction, high thermal conductivity, good electrical and optical properties, biocompatibility and no cytotoxicity. All properties of the films are not always ideal, so it is necessary to modify the layer. One example of how to modify the properties of thin layers are dopations. The incorporation of dopants in films may lead to greater multifunctionality and much improved properties. Most modifications were made to modify contact angle and surface energy, to reduce internal stresses, to decrease surface roughness, coefficient of friction or wear, to increase the adhesion to the substrate, biocompatibility, electrical conductivity and resistivity. Silver doped DLC were deposited on Si 100 and Ti6Al4V by pulsed laser ablation. Laser energy density was 8 J*cm-2 (C target for deposition Ti and Cr doped layers) and 10 J*cm-2 (for Ag doped layers) using KrF excimer laser. The topology, mechanical and antibacterial properties of films were investigated. The composition was analysed using wavelength-dependent X-ray spectroscopy. Mechanical properties of DLC films with various dopant and gradient layers were evaluated. Hardness (reduced Young's modulus) was determined by nanoindentation. Films adhesion was studied using scratch test and was decreasing with concentration of dopant. In vivo measurement (using gram positive and negative bacteria) of antibacterial properties of the Ag-DLC films. This result opens further possibility for application of doped and gradient DLC films in medicine.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20506 - Coating and films

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů