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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/68378271:_____/21:00541670

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

30404 - Biomaterials (as related to medical implants, devices, sensors)

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Applied Surface Science

ISSN

0169-4332

e-ISSN

1873-5584

Svazek periodika

539

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

000595143500005

EID výsledku v databázi Scopus

2-s2.0-85094319452