Patterned Slippery Surface for Bubble Directional Transportation and Collection Fabricated via a Facile Method

Area of Science:

• Materials Science
• Surface Chemistry
• Fluid Dynamics

Background:

• Underwater bubble manipulation is crucial for various applications like electrocatalysis and solar energy.
• Controlling bubble movement on solid surfaces presents significant challenges.

Purpose of the Study:

• To develop a novel patterned slippery surface (PSS) for directional control of underwater bubbles.
• To investigate the bubble capture and transportation capabilities of the fabricated surface.

Main Methods:

• Fabrication of PSS by etching pristine copper sheets to create patterned pathways.
• Utilizing differential wettability between pristine copper and modified oxide copper for bubble and water interaction.
• Infusing an oil layer to reduce resistance during bubble transportation.

Main Results:

• The PSS effectively captures and directs underwater bubbles.
• Bubbles demonstrated controlled movement in upward, downward, and horizontal directions.
• The surface design facilitates efficient bubble transportation and collection.

Conclusions:

• The developed PSS offers a facile and effective method for directional bubble manipulation.
• This technology has significant potential for enhancing electrocatalytic gas evolution, wastewater remediation, and solar energy harvesting.