Dual laser deposition of Ti:DLC composite for implants

Ti-doped hydrogen free diamond-like carbon (DLC) layers of dopation up to ~25 at.% were prepared by dual beam pulsed laser deposition (PLD) using two excimer lasers. The arrangement allows continuous fine tuning of dopant concentration on a large scale and deposition flexibility. The layers were pre...

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Bibliographic Details
Published in:Laser physics 2016-10, Vol.26 (10), p.105605
Main Authors: Jelínek, Miroslav, Zemek, Josef, Kocourek, Tomáš, Remsa, Jan, Mikšovský, Jan, Písa ík, Petr, Jurek, Karel, Tolde, Zden k, Trávní ková, Martina, Vandrovcová, Marta, Filová, Elena
Format: Article
Language:English
Subjects:
DLC
dopation
dual PLD
implants
thin films
Ti:DLC
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Summary:Ti-doped hydrogen free diamond-like carbon (DLC) layers of dopation up to ~25 at.% were prepared by dual beam pulsed laser deposition (PLD) using two excimer lasers. The arrangement allows continuous fine tuning of dopant concentration on a large scale and deposition flexibility. The layers were prepared on Si(1 0 0) and Ti6Al4V substrates at room temperature. The surface morphology, mechanical properties, bonds, composition, morphology of human osteoblast-like Saos-2 cells, their metabolic activity and production of osteocalcin, a marker of osteogenic cells' differentiation were tested. The films' composition changed after x-ray photoelectron spectroscopy (XPS) surface cleaning by argon clusters. Adhesion moved with Ti dopation from 4 N (DLC film) to 11 N (25 at.% of Ti in DLC). Creation of TiC was observed for higher Ti dopation. The contact angle and surface free energy stayed unchanged for higher Ti dopation. Saos-2 cells had the highest metabolic activity/viability on DLC with 10 at.% of Ti and on control polystyrene dishes on days 1 and 3. The Ti dopation improved the formation of vinculin-containing focal adhesion plaques in Saos-2 cells. Immunofluorescence staining revealed similar production of osteocalcin in cells on all tested samples.
ISSN:1054-660X
1555-6611
DOI:10.1088/1054-660X/26/10/105605