Fabrication of magnetic field induced structural colored films with tunable colors and its application on security materials

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• 作者：Shenglong Shang^a ; Qinghong Zhang^a ; Hongzhi Wang^a ; ^{wanghz@dhu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yaogang Li^b ; ^{yaogang_li@dhu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Magnetic field ; Structure color ; High physical rigidity ; Chain-like structure photolithography ; Security material
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：485
• 期：Complete
• 页码：18-24
• 全文大小：2569 K

文摘

A flexible, magnetic field induced structurally colored films with brilliant colors and high physical rigidity were reported in this article. Using an external magnetic field, the photocurable colloidal suspensions that containing superparamagnetic Fe₃O₄@C colloidal nanocrystal clusters (CNCs) could polymerize under UV light. After polymerization, the films with different colors (red, green, blue) were obtained. Through combination of suspensions which contains Fe₃O₄@C CNCs with different sizes, a series of multi-colored films were obtained. Moreover, these structural colors can be patterned easily by photolithography and various structural colored patterns were shown in the article. The structural colored patterns could conceal or display its color according to the changing of background which makes them hold significant potential applications for security materials.