Bonding and bio-properties of hybrid laser/magnetron Cr-enriched DLC layers

0458356 - FZÚ 2017 RIV NL eng J - Journal Article
Jelínek, Miroslav - Zemek, Josef - Vandrovcová, Marta - Bačáková, Lucie - Kocourek, Tomáš - Remsa, Jan - Písařík, Petr
Bonding and bio-properties of hybrid laser/magnetron Cr-enriched DLC layers.
Materials Science & Engineering C-Materials for Biological Applications. Roč. 58, Jan (2016), s. 1217-1224. ISSN 0928-4931. E-ISSN 1873-0191
R&D Projects: GA ČR GA15-05864S; GA MŠMT(CZ) LM2011026
Institutional support: RVO:68378271 ; RVO:67985823
Keywords : DLC * chromium * hybrid PLD * hexavalent chromium * trivalent chromium * cell adhesion * cell proliferation
Subject RIV: BM - Solid Matter Physics ; Magnetism; BO - Biophysics (FGU-C)
Impact factor: 4.164, year: 2016

Chromium-enriched diamond-like carbon (DLC) layers were prepared by a hybrid technology using a combination of pulsed laser deposition (PLD) and magnetron sputtering. XRD revealed no chromium peaks, indicating that the layers are mostly amorphous. Carbon (sp2 and sp3 bonds) and chromium bonds were determined by XPS from C 1s, O 1s, and Cr 2p photoelectron peaks. Depending on the deposition conditions, the concentration of Cr in DLC layers moved from zero to 10 at.% for as-received sample surfaces, and to about 31 at.% after mild sputter-cleaning by argon ion cluster beam. It should be noted that the most stable Cr3+ bonding state is in Cr2O3 and Cr(OH)3, and that there is the toxic Cr6+ state in CrO3. The surface content of hexavalent chromium in the Cr 2p3/2 spectra is rather low, but discernible.

Permanent Link: http://hdl.handle.net/11104/0258624