Biomimetic Colorants and Coatings Designed with Cephalopod-Inspired Nanocomposites.
Biomimetic Colorants and Coatings Designed with Cephalopod-Inspired Nanocomposites.
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采用受头足类启发的纳米复合材料设计的仿生着色剂和涂料。
作者：
Camille A Martin;Zhuangsheng Lin;Amrita Kumar;S. Dinneen;R. Osgood;L. Deravi
自然界中明亮而动态的颜色刺激了染料和颜料的设计，其应用范围从电子显示器到服装。受纳米结构的色素颗粒中存在的头足类色素细胞器官的启发，我们描述了生物混合着色剂的设计和制造包含头足类特定的色素，黄色素（Xa），封装在基于二氧化硅的纳米结构。我们采用了仿生的方法来封装Xa与胺封端的聚酰胺胺（PAMAM）树枝状聚合物模板，这有助于在封装过程中稳定的颜料。根据反应中使用的Xa浓度，所得的生物杂化纳米材料产生了一系列不同色调的中性色。当作为涂层应用时，这些着色剂可以在化学还原剂的存在下触发颜色从黄色/金色变为红色，因为我们利用了Xa的天然氧化还原依赖性颜色变化。总之，这些能力证明了将生物色素如Xa加工成纳米材料的能力，这些纳米材料可以作为具有可调和动态范围的涂层应用。
Brilliant and dynamic colors in nature have stimulated the design of dyes and pigments with broad applications ranging from electronic displays to apparel. Inspired by the nanostructured pigment granules present in cephalopod chromatophore organs, we describe the design and fabrication of biohybrid colorants containing the cephalopod-specific pigment, xanthommatin (Xa), encased within silica-based nanostructures. We employed a biomimetic approach to encapsulate Xa with amine-terminated polyamidoamine (PAMAM) dendrimer templates, which helped stabilize the pigment during encapsulation. Depending on the concentration of Xa used in the reaction, the resultant biohybrid nanomaterials generated a range of neutral colors of differing hues. When applied as coatings, these colorants can be triggered to change color from yellow/gold to red in the presence of a chemical reducing agent, as we leverage the natural redox-dependent color change of Xa. Altogether, these capabilities demonstrated the ability to process biochromes like Xa as nanomaterials that can be applied as coatings with a tunable and dynamic range.