Understanding the Electrophoretic Deposition Accompanied by Electrochemical Reactions toward Structurally Colored Bilayer Films

Tarutani Naoki

Uesugi Ryo

Uemura Kensuke

Katagiri Kiyofumi

Inumaru Kei

Takeoka Yukikazu

ACS Applied Materials and Interfaces

Safe, low-cost structurally colored materials are alternative colorants to toxic inorganic pigments and organic dyes. Colloidal amorphous arrays are promising structurally colored materials because of their angle-independent colors. In this study, we focused on precise tuning of the chromaticity by preparing bilayer colloidal amorphous arrays through electrophoretic deposition (EPD). Systematic investigations with various EPD conditions clarified the contributions of each condition to the EPD process and the competing electrochemical reactions, which enabled us to prepare well-colored coatings. EPD films composed of colloidal amorphous array bilayers were successfully synthesized with controlled film thickness. Chromaticity of the films was found to be precisely controlled by the EPD duration. We believe that this understanding of the EPD process and its application to synthesis of structurally colored bilayer films will bring structurally colored materials closer to practical industrial use.

structurally colored coatings

colloidal amorphous arrays

chromaticity tuning

electrophoretic deposition

electrochemical reaction

bilayer films

eng

American Chemical Society

This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Materials and Interfaces, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsami.2c04635

This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。

[ISSN] 1944-8244

[ISSN] 1944-8252

[DOI] 10.1021/acsami.2c04635

[DOI] https://doi.org/10.1021/acsami.2c04635