Magnetoresponsive Photonic Microspheres with Structural Color Gradient.
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.
Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 34141, South Korea.
Seung Yeol
SY
Lee
Graduate School of Nanoscience and Technology, KAIST, Daejeon, 34141, South Korea.
Jongkook
J
Choi
Department of Material Science and Engineering, Chungnam National University, Daejeon, 34134, South Korea.
Jong-Ryul
JR
Jeong
Graduate School of Nanoscience and Technology, KAIST, Daejeon, 34141, South Korea.
Jung H
JH
Shin
Department of Chemical and Biomolecular Engineering, KAIST, Daejeon, 34141, South Korea.
Shin-Hyun
SH
Kim
bandgaps; color gradients; microspheres; photonic crystals; structural colors