Multifunctional and Regenerable Antibacterial Surfaces Fabricated by a Universal Strategy

Area of Science:

• Materials Science
• Biomedical Engineering
• Surface Chemistry

Background:

• Developing versatile antibacterial surfaces is crucial for preventing infections.
• Existing methods struggle with diverse substrates and dead bacteria accumulation.
• Need for multifunctional and regenerable antibacterial surface solutions.

Purpose of the Study:

• To create a universal strategy for fabricating multifunctional and regenerable antibacterial surfaces.
• To address limitations of current antibacterial surfaces, including substrate compatibility and dead bacteria removal.
• To demonstrate simultaneous multifunctionality without compromising efficacy.

Main Methods:

• Fabrication of multilayered films with guest moieties on various substrates.
• Incorporation of biocidal β-cyclodextrin derivatives modified with quaternary ammonium salt groups (CD-QAS).
• Regeneration of surfaces using sodium dodecyl sulfate and re-treatment with CD-QAS.
• Co-incorporation of CD-QAS with other functional β-CD derivatives for multifunctionality.

Main Results:

• Achieved >95% killing of attached pathogenic bacteria.
• Demonstrated easy removal of dead bacteria and surface regeneration.
• Successfully created surfaces with simultaneous antibacterial and other specific biofunctions.
• Confirmed no compromise in efficacy when multiple functions were combined.

Conclusions:

• The universal strategy enables the creation of multifunctional and regenerable antibacterial surfaces.
• This approach is applicable to diverse materials and devices in biomedical fields.
• The developed surfaces offer a promising solution for advanced infection control.