Photonic materials with angular‐independent structural color are highly desirable because they offer the broad viewing angles required for application as colorants in paints, cosmetics, textiles, or displays. However, they are challenging to fabricate as they require isotropic nanoscale architectures with only short‐range correlation. Here, porous microparticles with such a structure are produced in a single, scalable step from an amphiphilic bottlebrush block copolymer. This is achieved by exploiting a novel “controlled micellization” self‐assembly mechanism within an emulsified toluene‐in‐water droplet. By restricting water permeation through the droplet interface, the size of the pores can be precisely addressed, resulting in structurally colored pigments. Furthermore, the reflected color can be tuned to reflect across the full visible spectrum using only a single polymer (M_n = 290 kDa) by altering the initial emulsification conditions. Such “photonic pigments” have several key advantages over their crystalline analogues, as they provide isotropic structural coloration that suppresses iridescence and improves color purity without the need for either refractive index matching or the inclusion of a broadband absorber.

中文翻译：

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通过两亲性刷毛嵌段共聚物的胶束化来控制角度独立的光子颜料

具有角度独立的结构颜色的光子材料是非常理想的，因为它们提供了在涂料，化妆品，纺织品或显示器中用作着色剂所需的宽视角。但是，由于它们仅需要短程相关性的各向同性纳米级架构，因此制造难度很大。在此，具有这种结构的多孔微粒是由两亲性的洗瓶刷嵌段共聚物在一个可扩展的步骤中生产的。这是通过在乳化的水滴状甲苯中利用新颖的“可控胶束化”自组装机制来实现的。通过限制水通过液滴界面的渗透，可以精确解决孔的大小，从而产生结构上有色的颜料。此外，M _n  = 290 kDa）通过改变初始乳化条件。此类“光子颜料”相对于其晶体类似物具有几个关键优势，因为它们提供了各向同性的结构着色，可抑制虹彩并提高色纯度，而无需折射率匹配或包含宽带吸收剂。