A laser-processed micro/nanostructures surface and its photothermal de-icing and self-cleaning performance

Area of Science:

• Materials Science
• Surface Engineering
• Nanotechnology

Background:

• Micro/nanostructures are crucial for applications like photocatalysis, sensors, and microchips.
• Fabricating high-resolution, multifunctional micro/nanostructures presents significant challenges.

Purpose of the Study:

• To propose a novel method for creating regular micro squares and nano bumps on steel substrates.
• To demonstrate the potential of these structures for anti-icing, de-icing, and self-cleaning applications.

Main Methods:

• Utilized surface tension gradient-driven liquid-air self-assembly to form a silica microsphere monolayer.
• Employed post-femtosecond laser processing for precise micro/nano surface decoration.
• Systematically investigated the influence of laser parameters (repetition frequency, scanning speed, incident power) on micro/nano structure characteristics.

Main Results:

• Demonstrated control over the size and shape of micro/nano decorations by adjusting laser parameters.
• Showcased varied self-cleaning effects, ice adhesion properties, and photothermal de-icing capabilities.
• Achieved surfaces with stable superhydrophilic and highly adhesive superhydrophobic properties, alongside high abrasion resistance.

Conclusions:

• The developed self-assembly and femtosecond laser processing technique offers a new pathway for fabricating smart micro/nanostructured surfaces.
• This approach enables the integration of multiple functionalities, such as anti-icing, self-cleaning, and abrasion resistance, onto a single material.
• The findings have broad implications for various surface engineering fields requiring advanced material properties.