Concurrent Biocompatibility and Antimicrobial Functionality of Soft Diamond-Like Carbon Coating for Healthcare...

Area of Science:

• Biomaterials Science
• Surface Engineering
• Infectious Disease Research

Background:

• Diamond-like carbon (DLC) coatings are explored for biomedical uses.
• Previous research often assessed biocompatibility and antimicrobial properties separately.
• Concurrent assessment is crucial for holistic material evaluation and safety in healthcare.

Purpose of the Study:

• To concurrently evaluate the biocompatibility and antimicrobial efficacy of soft, hydrogen-free DLC coatings.
• To assess the performance of DLC against methicillin-resistant Staphylococcus aureus (MRSA).
• To establish DLC as a safe material for integrated biocompatibility and antimicrobial applications.

Main Methods:

• Soft, hydrogen-free DLC coatings were fabricated using direct-current, open-field magnetron sputtering.
• Coatings were characterized for structural, physical, mechanical, and electrical properties.
• Biocompatibility was assessed using leached extracts with mouse fibroblast L929 cells over 168 hours.
• Antimicrobial performance against MRSA was evaluated after 24 hours.

Main Results:

• The soft DLC coatings demonstrated excellent biocompatibility with L929 cells.
• The coatings exhibited superior antimicrobial performance against MRSA compared to copper after 24 hours.
• Characterization confirmed the structural, physical, mechanical, and electrical properties of the DLC coatings.

Conclusions:

• Soft, hydrogen-free DLC coatings present a promising material for biomedical applications requiring both biocompatibility and antimicrobial activity.
• The concurrent reporting of these properties supports regulatory considerations and enhances safety and efficiency.
• DLC coatings offer a safe and effective alternative for antimicrobial surfaces in healthcare settings.