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Angew Chem Int Ed Engl. 2015 Dec 14;54(51):15368-73. doi: 10.1002/anie.201507503. Epub 2015 Oct 27.

Thermally Tunable Hydrogels Displaying Angle-Independent Structural Colors.

Author information

1
Department of Molecular Design and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 (Japan).
2
Department of Molecular Design and Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 (Japan). ytakeoka@apchem.nagoya-u.ac.jp.

Abstract

We report the preparation of thermally tunable hydrogels displaying angle-independent structural colors. The porous structures were formed with short-range order using colloidal amorphous array templates and a small amount of carbon black (CB). The resultant porous hydrogels prepared using colloidal amorphous arrays without CB appeared white, whereas the hydrogels with CB revealed bright structural colors. The brightly colored hydrogels rapidly changed hues in a reversible manner, and the hues varied widely depending on the water temperature. Moreover, the structural colors were angle-independent under diffusive lighting because of the isotropic nanostructure generated from the colloidal amorphous arrays.

KEYWORDS:

amorphous arrays; colloids; hydrogels; polymers; structural colors

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