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Rotating 1-D Magnetic Photonic Crystal Balls with Tunable Lattice Constant


The so far developed responsive photonic crystal (RPC) balls with adjustable lattice constant and controllable rotation are all based on Janus particles of three dimensional (3-D) periodical structures, which suffer from color uneveness and asymmetric volume change, limiting the applications in the fields of encoding, sensing and displays. In this work, we have developed the first 1-D magnetic photonic crystal balls with tunable lattice constants by fixing collectively oriented periodical 1-D magnetic nanochain-like structures in responsive polymer poly(N-isopropylacrylamide) hydrogel balls under magnetic field (H) and UV irradiation. The structure colors of the balls are uniform on the whole balls and can be regulated by temperature (T) and solvents. The as-prepared RPC balls always keep a perfectly spherical shape even when the hydrogel volume changes with stimuli because of the low content of the included 1-D magnetic nanochain-like structures. This endows smooth rotation with the H direction to switch “on/off” their structure colors at various stimuli, as demonstrated by a colorful display application at temperature from 10 to 35 oC. The as-developed RPC balls are expected to have promising potential applications in color display, rewritable signage, biological and chemical sensors due to their excellent multi-response properties.

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Publication details

The article was received on 11 May 2017, accepted on 13 Jun 2017 and first published on 14 Jun 2017

Article type: Paper
DOI: 10.1039/C7NR03335D
Citation: Nanoscale, 2017, Accepted Manuscript
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    Rotating 1-D Magnetic Photonic Crystal Balls with Tunable Lattice Constant

    W. Luo, J. Yan, Y. Tan, H. Ma and J. Guan, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03335D

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