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Issue 47, 2019
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Rugby-ball-like photonic crystal supraparticles with non-close-packed structures and multiple magneto-optical responses

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Abstract

Self-assembly of non-spherical building blocks offers a potential route to photonic crystal supraparticles (PCSs) with novel structures and optical properties. However, experimental fabrications of anisotropic-particle-based PCSs have rarely been demonstrated owing to the requirement of additional control over the particle orientation during the assembly process. Here, we develop a spatially confined magnetic assembly strategy for the tailored assembly of ellipsoidal particles into PCSs with unusual non-close-packed structures. Detailed studies reveal that the transition of these metastable structures into close-packed structures is kinetically inhibited during the drying process owing to the synergy of spatial confinement and magnetic alignment. Unlike conventional PCSs, the nanoellipsoid-based PCSs exhibit anisotropic optical properties and multiple magneto-optical responses. The present work not only provides a model system for studying colloidal assembly under spatially confined conditions but also greatly extends the family of PCSs with interesting structures and properties, bringing new opportunities for applications in various areas.

Graphical abstract: Rugby-ball-like photonic crystal supraparticles with non-close-packed structures and multiple magneto-optical responses

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Publication details

The article was received on 04 Oct 2019, accepted on 05 Nov 2019 and first published on 07 Nov 2019


Article type: Paper
DOI: 10.1039/C9TC05438C
J. Mater. Chem. C, 2019,7, 15042-15048

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    Rugby-ball-like photonic crystal supraparticles with non-close-packed structures and multiple magneto-optical responses

    J. Liu, M. Xiao, C. Li, H. Li, Z. Wu, Q. Zhu, R. Tang, A. B. Xu and L. He, J. Mater. Chem. C, 2019, 7, 15042
    DOI: 10.1039/C9TC05438C

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