Enhanced antibacterial and corrosion resistance performance of fluorine-doped diamond-like carbon coatings on 316 L stainless steel
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2025-04-03 |
| Journal | Colloids and Surfaces B Biointerfaces |
| Authors | Yimeng Wang, Temitope Olumide Olugbade, Stefan Wackerow, Yongwei Cai, Shuai Zhang |
| Institutions | University of Dundee, Queen’s University Belfast |
| Citations | 1 |
Abstract
Section titled “Abstract”Biomedical materials must meet increasingly stringent standards for antibacterial efficacy and corrosion resistance. This study investigates the enhancement of these properties in 316 L stainless steel through the application of fluorine-doped diamond-like carbon (F-DLC) coatings. A series of F-DLC coatings with varying fluorine (F) concentrations were fabricated using plasma-enhanced chemical vapour deposition (PECVD). Fluorine doping increased the sp<sup>2</sup>/sp<sup>3</sup> ratio (0.65-0.93) and enhanced surface hydrophobicity, as indicated by an increase in the contact angle from 63.1° to 79.7°. The impact of F concentration on bacterial adhesion was investigated using Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). DLC coatings with higher F concentrations and sp<sup>2</sup>/sp<sup>3</sup> ratios exhibited a notable reduction in bacterial adhesion - up to 74 % for E. coli and 77 % for S. aureus - compared to uncoated stainless steel. The extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theory was employed to model bacteria-surface interactions, revealing the role of F in bacterial adhesion behaviour. Furthermore, the F-DLC coatings achieved a significant corrosion inhibition rate of 98.3 % in Hanks’ balanced salt solution at 37 °C. Overall, higher F concentrations in the DLC coatings promote antibacterial and anti-corrosion performance by shifting the carbon structure from a three-dimensional sp<sup>3</sup>-dominated configuration to a two-dimensional sp<sup>2</sup>-rich structure.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
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