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Structural Color Palettes of Core–Shell Photonic Ink Capsules Containing Cholesteric Liquid Crystals
Author(s) -
Lee Sang Seok,
Seo Hyeon Jin,
Kim Yun Ho,
Kim ShinHyun
Publication year - 2017
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201606894
Subject(s) - structural coloration , materials science , palette (painting) , core (optical fiber) , photonics , shell (structure) , photonic crystal , inkwell , liquid crystal , optoelectronics , iridescence , nanotechnology , optics , composite material , physics , computer science , operating system
Photonic microcapsules with onion‐like topology are microfluidically designed to have cholesteric liquid crystals with opposite handedness in their core and shell. The microcapsules exhibit structural colors caused by dual photonic bandgaps, resulting in a rich variety of color on the optical palette. Moreover, the microcapsules can switch the colors from either core or shell depending on the selection of light‐handedness.