Original Article

Citation: NPG Asia Materials (2017) 9, e355; doi:10.1038/am.2017.13
Published online 10 March 2017

Structural color coating films composed of an amorphous array of colloidal particles via electrophoretic deposition
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Kiyofumi Katagiri1,3, Yuuki Tanaka1, Kensuke Uemura1, Kei Inumaru1, Takahiro Seki2 and Yukikazu Takeoka2,3

  1. 1Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Hiroshima, Japan
  2. 2Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Japan

Correspondence: Professor K Katagiri, Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8527, Japan. E-mail: kktgr@hiroshima-u.ac.jp; Professor Y Takeoka, Department of Molecular Design and Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan. E-mail: ytakeoka@apchem.nagoya-u.ac.jp

3These authors contributed equally to this work.

Received 20 September 2016; Revised 20 December 2016; Accepted 3 January 2017

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Abstract

It is desirable to fabricate colorful coatings that have nonfading properties and are environmentally friendly. In this study, a novel approach for creating structural color coatings from monodisperse silica particles is presented. The structural color coating films, formed from an array of silica particles with a small amount of black additive, are easily prepared by a simple electrophoretic deposition (EPD) technique. The arrangement of the particle array is controlled by varying the applied voltage and deposition time. The iridescence, that is, the angular dependence, of the structural color dramatically changes with the arrangement of the particle array. A variety of colored coatings can be produced by changing the size of the particles. Structural color coatings on materials with curved surfaces and complicated shapes are also achieved by the EPD method.

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