Ultrascalable Multifunctional Nanoengineered Copper and Aluminum for Antiadhesion and Bactericidal Applications

Area of Science:

• Materials Science
• Nanotechnology
• Biotechnology

Background:

• Biofouling compromises engineered surfaces.
• Natural surfaces utilize physical mechanisms to prevent biofouling.
• Nanoscale topography influences bacterial adhesion and growth.

Purpose of the Study:

• Develop scalable, cost-effective nanoengineered surfaces with both antiadhesion and bactericidal properties.
• Investigate the role of hydrophobicity and structure length scale (nano vs. micro) in bactericidal performance.
• Explore synergistic antiadhesion and bactericidal effects on copper and aluminum substrates.

Main Methods:

• Nanoengineering of copper (Cu) and aluminum (Al) substrates.
• Characterization using scanning electron microscopy (SEM) and atomic force microscopy (AFM).
• Assessment of antiadhesion and bactericidal properties via bacterial staining, live/dead imaging, and viability measurements.

Main Results:

• Nanoengineered surfaces deformed adhered Escherichia coli bacteria.
• Increased superhydrophobicity reduced bacterial adhesion but minimally affected bactericidal performance.
• Densely packed nanoscale structures improved antiadhesion over microscale features, even up to 24 hours.
• Superhydrophobic aluminum demonstrated superior long-term antiadhesion and bactericidal effects.

Conclusions:

• Nanoengineered surfaces offer a scalable solution for antiadhesion and bactericidal properties.
• Surface topography and superhydrophobicity are key factors in controlling bacterial interactions.
• Superhydrophobic aluminum surfaces show promise for advanced multifunctional applications.