The springtail cuticle as a blueprint for omniphobic surfaces

Area of Science:

• Biomimetics and Materials Science
• Surface Science and Engineering

Background:

• Omniphobic surfaces, inspired by nature, offer potential for advanced technologies.
• Natural examples like springtail cuticles exhibit remarkable water and oil repellency.
• Existing artificial surfaces like lotus-inspired ones have limitations in durability and effectiveness.

Purpose of the Study:

• To review liquid-repellent natural surfaces in arthropods, focusing on springtails.
• To explore the cuticular morphology, chemistry, and biological relevance of these surfaces.
• To derive design criteria for robust omniphobic surfaces based on natural examples.

Main Methods:

• Literature review of natural liquid-repellent surfaces in arthropods.
• Analysis of springtail cuticle morphology and chemistry.
• Evaluation of liquid repellency and mechanical stability of natural surfaces.

Main Results:

• Springtail cuticles possess hierarchical surface patterns providing robust wetting resistance.
• Natural surfaces demonstrate high efficiency in repelling various liquids, including low surface tension ones.
• Surface topography (nano- and micro-patterns) is crucial for both wetting resistance and mechanical stability.

Conclusions:

• Springtail-inspired surfaces offer a promising alternative to current artificial omniphobic materials.
• Hierarchical topographical features are key for designing durable and effective omniphobic surfaces.
• Understanding natural principles can guide the development of advanced biomimetic materials.