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Laser Structuring of Underwater Bubble-Repellent Surface.

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Researchers developed a novel superaerophobic surface using femtosecond laser writing. This bubble-repellent surface minimizes underwater gas bubble adhesion, protecting metal pipework and extending device lifespan.

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Fluid Dynamics

Background:

  • Underwater gas bubbles can adhere to metal surfaces, causing damage and reducing the lifespan of equipment.
  • Preventing bubble adhesion is crucial for maintaining the integrity and efficiency of underwater systems.

Purpose of the Study:

  • To develop a simple method for fabricating underwater bubble-repellent surfaces.
  • To investigate the properties of surfaces created using femtosecond laser direct writing for bubble repulsion.

Main Methods:

  • One-step femtosecond laser direct writing technology was employed to create the specialized surface.
  • Characterization of surface properties included superhydrophilicity in air and superaerophobicity in water.

Main Results:

  • The fabricated surface demonstrated superaerophobicity in water with a bubble contact angle of 159±2.5°.
  • The surface exhibited ultralow bubble adhesion and a small bubble rolling angle.
  • The mechanism behind the bubble-repellent properties was investigated.

Conclusions:

  • Femtosecond laser direct writing offers an effective route to create underwater superaerophobic surfaces.
  • The developed surfaces show potential for applications in underwater bubble-repelling facilities, reducing damage and improving device longevity.