Ultra-antireflective synthetic brochosomes

Area of Science:

• Biomimetics and Materials Science
• Nanotechnology and Surface Engineering

Background:

• Natural antireflective surfaces are rare, with insect compound eyes being an early example.
• Leafhoppers produce unique microscale granules called brochosomes with nanoscale indentations.

Purpose of the Study:

• To fabricate and optically characterize biologically inspired antireflective surfaces emulating leafhopper brochosomes.
• To explore the potential of brochosome-inspired coatings for various applications.

Main Methods:

• Utilized double-layer colloidal crystal templates for structure fabrication.
• Employed site-specific electrochemical growth for creating the brochosome coatings (BCs).
• Demonstrated compatibility with diverse materials like metals, metal oxides, and conductive polymers.

Main Results:

• Achieved strong omnidirectional antireflective performance across a wide wavelength range (250–2000 nm).
• The performance of the brochosome coatings (BCs) is comparable to state-of-the-art antireflective technologies.
• Provided evidence for brochosomes' role in camouflage against predators.

Conclusions:

• Brochosome-inspired coatings offer a novel approach to antireflective surface design.
• These coatings have significant potential for applications in solar energy harvesting, imaging, and sensing.
• The study highlights the functional significance of brochosomes in nature and their technological promise.