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Solution‐Processable Photonic Inks of Mie‐Resonant Hollow Carbon–Silica Nanospheres
Authors:Seung‐Hyun Kim  Victoria Hwang  Sang Goo Lee  Jong‐Wook Ha  Vinothan N Manoharan  Gi‐Ra Yi
Abstract:Hollow carbon–silica nanospheres that exhibit angle‐independent structural color with high saturation and minimal absorption are made. Through scattering calculations, it is shown that the structural color arises from Mie resonances that are tuned precisely by varying the thickness of the shells. Since the color does not depend on the spatial arrangement of the particles, the coloration is angle independent and vibrant in powders and liquid suspensions. These properties make hollow carbon–silica nanospheres ideal for applications, and their potential in making flexible, angle‐independent films and 3D printed films is explored.
Keywords:hollow carbon silica  Mie scattering  photonic glass  self‐assembly
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