Magnetoresponsive Photonic Microspheres with Structural Color Gradient

Seung Yeol Lee; Jongkook Choi; Jong-Ryul Jeong; Jung H Shin; Shin-Hyun Kim

doi:10.1002/adma.201605450

Magnetoresponsive Photonic Microspheres with Structural Color Gradient

Adv Mater. 2017 Apr;29(13). doi: 10.1002/adma.201605450. Epub 2017 Feb 6.

Authors

Seung Yeol Lee¹, Jongkook Choi², Jong-Ryul Jeong³, Jung H Shin², Shin-Hyun Kim¹

Affiliations

¹ Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 34141, South Korea.
² Graduate School of Nanoscience and Technology, KAIST, Daejeon, 34141, South Korea.
³ Department of Material Science and Engineering, Chungnam National University, Daejeon, 34134, South Korea.

PMID: 28165161
DOI: 10.1002/adma.201605450

Abstract

Photonic Janus particles are created by alternately sputtering silica and titania on microspheres in order to obtain a structural color gradient. In addition, the microspheres are rendered magnetoresponsive. The Janus microspheres with optical and magnetic anisotropy enable on-demand control over orientation and structural color through manipulation of an external magnetic field, thereby being useful as active color pigments for reflection-mode displays.

Keywords: bandgaps; color gradients; microspheres; photonic crystals; structural colors.