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Opt Express. 2011 Jun 20;19(13):12799-808. doi: 10.1364/OE.19.012799.

Imitation of variable structural color in Paracheirodon innesi using colloidal crystal films.

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College of Chemical and Environmental Engineering, Qingdao University, Qingdao 266071, China.


Spacing variation of adjoining reflecting thin films in iridophore is responsible for the variable interference color in the paracheirodon innesi. On the basis of this phenomenon, colloidal crystal thin films with different structures are fabricated from monodisperse poly(styrene-methyl methacrylate-acrylic acid) (PSMA) colloids. The relationship between the colors and structures of the films is investigated and discussed according to the principle of light interference. A two-layer colloidal film having uniform color is researched and it displays diverse colors before and after swelling by styrene (St), which can be used to mimic the variable structural color of the paracheirodon innesi.

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