Magnetically Driven Cactus Spinelike Superhydrophobic Fe₃O₄ Vertical Array for High-Performance Fog Harvesting.

Area of Science:

• Materials Science
• Surface Engineering
• Nanotechnology

Background:

• Cactus-inspired structures offer high fog harvesting efficiency.
• Challenges exist in fabricating and controlling these structures.

Purpose of the Study:

• To develop a simple and controllable method for fabricating cactus spinelike superhydrophobic structures.
• To enhance fog harvesting efficiency using bionic structures.

Main Methods:

• A magnetically driven spray-coating method was employed.
• Magnetic Fe3O4 particles and organosilicon resin were atomized into droplets and arranged by magnetic fields.
• Fabricated structures on nonwoven cotton fabric.

Main Results:

• Achieved micrometer-scale conical structures with a high degree of bionic resemblance.
• Demonstrated an exceptional fog harvesting efficiency of approximately 6.33 g cm-2 h-1.
• The fabricated material outperformed existing state-of-the-art fog harvesting materials.

Conclusions:

• The magnetically driven spray-coating method is simple, controllable, and effective for fabricating bionic fog harvesting structures.
• This strategy provides a viable route for developing high-performance fog harvesting materials.