Bioinspired antifouling Fe-based amorphous coating via killing-resisting dual surface modifications

Area of Science:

• Materials Science
• Surface Engineering
• Marine Technology

Background:

• Fe-based amorphous coatings offer excellent corrosion resistance for marine applications.
• Marine biofouling presents a significant challenge, hindering coating performance and longevity.
• Shark skin's micro-nano hierarchical structure inspires effective antifouling strategies.

Purpose of the Study:

• To develop a bioinspired Fe-based amorphous coating with dual-effect antifouling properties.
• To integrate micro-patterned nanostructured Cu2O fibers and a superhydrophobic surface.
• To evaluate the coating's resistance against marine organisms and proteins.

Main Methods:

• Surface modification of Fe-based amorphous coatings.
• Incorporation of micro-patterned nanostructured Cu2O fibers for a 'killing' effect.
• Application of a superhydrophobic surface for a 'resisting' effect.

Main Results:

• Achieved 98.6% resistance to Nitzschia closterium f. minutissima.
• Demonstrated 87% resistance to Bovine serum albumin protein.
• Showcased 99.8% resistance to Pseudomonas aeruginosa.
• Coating exhibited excellent mechanical robustness and durability.

Conclusions:

• The synergistic antifouling mechanism combines physical resistance and chemical killing.
• Superhydrophobic surface prevents protein adsorption, while Cu2O fibers kill bacteria.
• This bioinspired coating offers a promising solution for durable, antifouling marine applications.