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Home > News > Surface coatings: Nanoscale snowmen look blank

February 26th, 2004

Surface coatings: Nanoscale snowmen look blank

Abstract:
Moths' eyes don't show up in car headlights as they have an anti-reflective 'stealth' surface, which helps moths evade predators. Some artificial anti-reflective coatings mimic the microscopic structure of moth eyes, which are covered with an array of protuberances around 200 nm high. The ideal shape of these bumps is conical, as this produces a gradual change in refractive index that minimizes reflection.

Source:
* Nature

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