Reflection-proof screens are closer together thanks to the butterfly wing

Researchers at the Karlsruhe Institute of Technology in Germany recently published a study that could lead to the creation of anti-glare screens on smartphones, monitors and tablets.

In your job, the researchers analyze the butterfly’s wings Greta oro, common in Central America, popularly known as “Glasswing Butterfly”. The nickname motivated by the transparent wings of the insect. According to the study, the butterfly’s wings reflect only 2% to 5% of the light that falls on them; the glass, for comparison, reflects from 8% to 100%, depending on the viewing angle.

The researchers found that this effect comes from nanomolecular structures present in the insect’s wings. Using an electron microscope, they were able to realize that the more random the heights of these structures were, the less light was reflected by the wings. This phenomenon is vital for the butterfly, as it helps it escape the field of vision of its predators. See below a photograph of these nanostructures:

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In simulations, the study authors were able to model the irregular structure of the butterfly’s wings. The resulting structure, in addition to reflecting little light, was also hydrophobic (repels water) and remained clean. The team intends to continue researching to reproduce the effect in a synthetic way, as it believes that it can have practical applications in situations that benefit from surfaces with a low index of light reflection.

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