High Heat Resistance of the Structural Coloration of Colloidal Arrays with Inorganic Black Additives

ACS Applied Materials and Interfaces Volume 14 Issue 25 Page 29324-29330 published_at 2022-06-21
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Title ( eng )
High Heat Resistance of the Structural Coloration of Colloidal Arrays with Inorganic Black Additives
Yamanaka Takahiro
Takeoka Yukikazu
Masui Toshiyuki
Source Title
ACS Applied Materials and Interfaces
Volume 14
Issue 25
Start Page 29324
End Page 29330
Structurally colored materials consisting of arrays of submicrometer-sized particles have drawn a great deal of attention because of their advantages, including low cost, low impact on human health as well as the environment, and resistance to fading. However, their low thermal stability is considered to be a critical issue for their practical use as colorants. Black-colored substances that can absorb the white color are added to colloidal array-type structurally colored materials to enhance their chromaticity. The poor thermal stability of commonly used black coloring additives, carbon black and Fe3O4 nanoparticles, is a main factor that reduces the heat resistance of structural coloration. Here, we demonstrate the preparation of structurally colored materials with extraordinarily high heat resistance of coloration, up to 900 °C. Several metal oxides, i.e., calcium manganese-based oxide (CCMO), chromium–iron–cobalt–nickel oxide (CFCNO), and lanthanum manganite (LMO), are synthesized and employed as black additives for structurally colored coatings prepared by the electrophoretic deposition of spherical silica particles. When CCMO is used as a black additive, the coloration heat resistance of the film is stable up to 700 °C. On the other hand, the films maintain vivid structural colors after exposure to 900 °C temperatures when CFCNO and LMO are employed as black additives. On the basis of this finding, high heat resistance of structural colors requires both heat resistance of the black additives and nonreactivity with the components of the spherical particles used for colloidal arrays.
structural color
environmentally friendly colorants
thermal stability
black metal oxides
electrophoretic deposition
This work was supported by JSPS KAKENHI (Grant Numbers JP18K19132, JP18H01709, JP19H04699, JP19K05668, and JP20H02439).
Resource Type journal article
American Chemical Society
Date of Issued 2022-06-21
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.2c08649
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。
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 1944-8244
[ISSN] 1944-8252
[DOI] 10.1021/acsami.2c08649
[DOI] https://doi.org/10.1021/acsami.2c08649
Remark The full-text file will be made open to the public on 21 June 2023 in accordance with publisher's 'Terms and Conditions for Self-Archiving'