In-depth distribution of elements and chemical bonds in the surface region of calcium-doped diamond-like carbon films

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21460%2F21%3A00358392" target="_blank" >RIV/68407700:21460/21:00358392 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/21:00541670
Result on the web
<a href="https://doi.org/10.1016/j.apsusc.2020.148250" target="_blank" >https://doi.org/10.1016/j.apsusc.2020.148250</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apsusc.2020.148250" target="_blank" >10.1016/j.apsusc.2020.148250</a>

Result language
angličtina
Original language name
In-depth distribution of elements and chemical bonds in the surface region of calcium-doped diamond-like carbon films
Original language description
In the present work we determined surface composition and chemical bonds at the top surface and in a shallow sub-surface region of the calcium-doped diamond-like carbon (DLC) layers using angular-resolved photoelectron spectroscopy (ARXPS) aided by the Maximum Entropy Method (MEM). The resulting non-destructive depth profiles showed that the composition and the chemical bonding vary significantly on the way from the top surface to the shallow sub-surface region. We demonstrate, for the first time, that Ca doping induced (i) the accumulation of the calcium carbonate, CaCO3, at the surface, while the calcium oxide, CaO, is located in a deeper sub-surface region, (ii) structural conversion from the C sp(2)-rich top surface observed in the undoped DLC layer to the C sp(3)-rich top surface of the Ca-doped DLC samples, and (iii) conversion in the opposite direction which occurred in a sub-surface region. Our conclusions are consistent with Raman and Ion Surface Scattering spectra. Obtained results can be useful for deeper understanding the interaction between doped DLC layer surfaces with surroundings and particularly with living tissue.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
30404 - Biomaterials (as related to medical implants, devices, sensors)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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