Nano-engineering safer-by-design nanoparticle based moth-eye mimetic bactericidal and cytocompatible polymer surfaces

Area of Science:

• Nanotechnology
• Materials Science
• Microbiology

Background:

• Drug-resistant bacteria pose a significant global health threat.
• Nanotechnology offers novel strategies for developing advanced antibacterial materials.
• Existing antibacterial approaches often face challenges with efficacy and safety.

Purpose of the Study:

• To develop and evaluate moth-eye nanocomposite surfaces with enhanced antibacterial properties.
• To investigate a dual mode of action combining nanoparticle functionality and surface topography.
• To create safer-by-design antibacterial materials with minimized nanoparticle concentration.

Main Methods:

• Fabrication of moth-eye nanocomposite surfaces using nanoparticle coating and surface nanoimprinting.
• Assessment of antibacterial activity against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli, Pseudomonas aeruginosa) bacteria.
• Evaluation of cytotoxicity on human keratinocytes.

Main Results:

• Moth-eye nanocomposite surfaces demonstrated broad-spectrum antibacterial activity.
• Bacteria inhibition efficiencies reached up to 90% compared to neat moth-eye surfaces.
• The nanocomposite surfaces exhibited non-cytotoxic behavior, supporting human cell proliferation.

Conclusions:

• Moth-eye nanocomposite surfaces represent a promising advancement in antibacterial material design.
• The synergistic effect of nanoparticle functionalization and surface topography enhances bactericidal efficiency.
• These materials offer a safe and effective alternative for combating drug-resistant bacterial infections.