title: Structural Color Palettes of Core-Shell Photonic Ink Capsules Containing Cholesteric Liquid Crystals.
abstract: 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.
authors.affiliation: Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701, Republic of Korea.
authors.forename: Sang Seok
authors.initials: SS
authors.lastname: Lee
authors.affiliation: Advanced Functional Materials Research Group, Korea Research Institute of Chemical Technology, Daejeon, 305-600, Republic of Korea.
authors.forename: Hyeon Jin
authors.initials: HJ
authors.lastname: Seo
authors.affiliation: Advanced Functional Materials Research Group, Korea Research Institute of Chemical Technology, Daejeon, 305-600, Republic of Korea.
authors.forename: Yun Ho
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Chemical and Biomolecular Engineering (BK21+ Program), KAIST, Daejeon, 305-701, Republic of Korea.
authors.forename: Shin-Hyun
authors.initials: SH
authors.lastname: Kim
keywords: core-shell capsules; handedness of light; liquid crystals; microfluidics; triple-emulsion drops