Balancing Robustness, Transparency, and Superwetting via Embedding Functional Nanoparticles in V-Groove Architectures

Area of Science:

• Materials Science
• Surface Chemistry
• Nanotechnology

Background:

• Developing robust transparent superamphiphobic (SAP) and superhydrophobic (SH) coatings is difficult due to trade-offs between surface structure, clarity, repellency, and durability.
• Existing methods often compromise optical properties or mechanical strength.

Purpose of the Study:

• To create a balanced strategy for transparent, mechanically robust SAP/SH coatings.
• To overcome the limitations of current coating technologies.

Main Methods:

• Utilized femtosecond laser etching to create V-groove microstructures on glass.
• Functionalized SiO2 nanoparticles were integrated with the etched structures.
• Evaluated contact angles, spectral transmittance, abrasion resistance, and chemical stability.

Main Results:

• Achieved high water (173.6°) and oil (170.4°) contact angles.
• Enhanced spectral transmittance from 80.4% to 82.1% (380-1100 nm).
• Demonstrated superior mechanical robustness, retaining SH performance after 50 abrasion cycles compared to non-etched samples (2 cycles).
• Exhibited excellent chemical and environmental stability in various conditions.

Conclusions:

• The combined V-groove and nanoparticle approach effectively balances transparency, superwetting, and mechanical robustness.
• This method provides a practical route for fabricating durable, multifunctional coatings.
• Potential applications include self-cleaning and anti-icing surfaces for architectural glazing and photovoltaics.