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Authors
Wen, Guo-YuZhou, Xing-Long
Tian, Xiao-Yu
Xie, Rui
Ju, Xiao-Jie
Liu, Zhuang
Faraj, Yousef
Wang, Wei
Chu, Liang-Yin
Affiliation
University of Chester; Sichuan UniversityPublication Date
2022-04-01
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Pigmentary coloration can produce viewing angle-independent uniform colors via light absorption by chromophores. However, due to the limited diversity in the changes of the molecular configuration of chromophores to undergo color change, the existing materials cannot produce a wide range of visible colors with tunable color saturation and transmittance. Herein, we propose a novel strategy to create materials with a wide visible color range and highly tunable color saturation and transmittance. We fabricated a hydrogel with poly (acrylamide-co-dopamine acrylamide) networks swollen with Fe3+-containing glycerol/water in which the covalently crosslinked polyacrylamide backbone with pendant catechols can ensure that the hydrogel maintains a very stable shape. Hydrogels containing adjustable catechol-Fe3+ coordination bonds with flexible light-interacting configuration changes can display a wide range of visible colors based on the complementary color principle. The catechol-Fe3+ complexes can dynamically switch between noncoordinated and mono-, bis- and tris-coordinated states to harvest light energy from a specific wavelength across the whole visible spectrum. Therefore, these hydrogels can be yellow, green, blue, and red, covering the three primary colors. Moreover, color saturation and transmittance can be flexibly manipulated by simply adjusting the Fe3+ content in the hydrogel networks. The versatility of these smart hydrogels has been demonstrated through diverse applications, including optical filters for color regulation and colorimetric sensors for detecting UV light and chemical vapors. This proposed smart hydrogel provides a universal color-switchable platform for the development of multifunctional optical systems such as optical filters, sensors, and detectors.Citation
Wen, G.-Y., Zhou, X.-L., Tian, X.-Y., Xie, R., Ju, X.-J., Liu, Z., Faraj, Y., Wang, W., & Chu, L.-Y. (2022). Smart hydrogels with wide visible color tunability. NPG Asia Materials, 14(1), 29. https://doi.org/10.1038/s41427-022-00379-3Publisher
Springer NatureJournal
NPG Asia MaterialsAdditional Links
https://www.nature.com/articles/s41427-022-00379-3Type
ArticleISSN
1884-4049EISSN
1884-4057ae974a485f413a2113503eed53cd6c53
10.1038/s41427-022-00379-3
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