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Solution‐Processable Photonic Inks of Mie‐Resonant Hollow Carbon–Silica Nanospheres
Author(s) -
Kim SeungHyun,
Hwang Victoria,
Lee Sang Goo,
Ha JongWook,
Manoharan Vinothan N.,
Yi GiRa
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201900931
Subject(s) - materials science , structural coloration , mie scattering , carbon fibers , saturation (graph theory) , absorption (acoustics) , scattering , light scattering , optics , composite material , nanotechnology , chemical engineering , optoelectronics , photonic crystal , composite number , physics , mathematics , combinatorics , engineering
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.