Cu oxidation mechanism on Cu-Zr(O)N coatings: Role on functional properties
| Autor: | José D. Castro, Mariana Henriques, Maria J. Lima, Isabel Carvalho, Sandra Carvalho |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
General Physics and Astronomy chemistry.chemical_element 02 engineering and technology engineering.material 010402 general chemistry 01 natural sciences Oxygen X-ray photoelectron spectroscopy Coating Sputtering Thin film Deposition (law) Thin Films Zirconium Science & Technology Surfaces and Interfaces General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Copper 0104 chemical sciences 3. Good health Surfaces Coatings and Films Antibacterial CuO chemistry engineering sputtering 0210 nano-technology ZrON Nuclear chemistry |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | Zirconium oxynitride (Zr(O)N) and Copper-Zirconium oxynitrides (Cu-Zr(O)N) were deposited by a DC reactive magnetron sputtering technique on stainless steel substrates. A duty cycle controller was used to obtain different oxygen contents in the developed films and a chemical activation procedure was carried out to obtain copper oxides. The samples were chemical and structurally characterized by SEM, EDS, XRD and XPS. Additional functional features were evaluated according to colour variation and inhibition halo tests. Zr(O)N and Cu-Zr(O)N surfaces showed a wide colour variation from golden to black tones, progressing through intermediate tones such as purple, blue and bluish grey. An antibacterial effect was only obtained after the chemical activation of Cu-ZrON-DC100, which showed a Zr(O)N matrix incapable of catching more oxygen from deposition. After, with the additional availability of O2- ions, the Cu present in the coating reacted with these ions forming CuO. The antibacterial mechanism was associated with the aforementioned characterizations and ICP-OES spectroscopy. The Cu2+ ions release had no influence on the antibacterial effect although the presence of CuO was decisive in obtaining an antibacterial behaviour. The acquired results demonstrated a potential multifunctionality of Cu-Zr(O)N coatings, joining an aesthetical surface with an antibacterial effect. This research is sponsored by FEDER funds through the COMPETE program - Competitive Factors Operational Program - and by national funds through FCT - Foundation for Science and Technology - under the scope of the strategic funding of co-financed via UIDB/00285/2020 and UIDB/04650/2020 unit and BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020 - Programa Operacional Regional do Norte, On-SURF (co-financed via FEDER (PT2020) POCI-01-0247-FEDER 546024521; The authors also thank the financial support in the framework of HEALTHYDENT - POCI-01-0145-FEDER-030708) and ATRITO-0 (co-financed via FEDER (PT2020) POCI-01- 0145-FEDER-030446. info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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