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Bottom‐up assembly can organize simple building blocks into complex architectures for light manipulation. The optical properties of self‐assembled polycrystalline barium carbonate/silica double helices are studied using fluorescent Fourier and Mueller matrix microscopy. Helices doped with fluorescein direct light emission along the long axis of the structure. Furthermore, light transmission measured...
In article number 1908218, Willem L. Noorduin and co‐workers present self‐assembled, microscopic BaCO3/SiO2 double helices, which integrate directional emission and enantiomorph‐specific circular retardance. This optical response emerges from the arrangement of nanoscopic mineral crystallites in the microscopic helix, and demonstrates how bottom‐up assembly can achieve ordering across multiple length...
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