Responsive Block Copolymer Photonic Microspheres

Yi Yang, Hodae Kim, Jiangping Xu, Min Soo Hwang, Di Tian, Ke Wang, Lianbin Zhang, Yonggui Liao, Hong Kyu Park, Gi Ra Yi, Xiaolin Xie, Jintao Zhu

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Responsive photonic crystals (PCs) have attracted much attention due to their broad applications in the field of chemical and physical sensing through varying optical properties when exposed to external stimuli. In particular, assembly of block copolymers (BCPs) has proven to be a robust platform for constructing PCs in the form of films or bulk. Here, the generation of BCPs photonic microspheres is presented with 3D periodical concentric lamellar structures through confined self-assembly. The structural color of the spherical PCs can be tuned by selective swelling of one block, yielding large change of optical property through varying both layer thickness and refraction index of the domains. The as-formed spherical PCs demonstrate large reflection wavelength shift (≈400–700 nm) under organic solvent permeation and pH adjustment. Spherical shape and structural symmetry endow the formed spherical PCs with rotation independence and monochrome, which is potentially useful in the fields of displays, sensing, and diagnostics.

Original languageEnglish
Article number1707344
JournalAdvanced Materials
Volume30
Issue number21
DOIs
Publication statusPublished - 2018 May 24

Keywords

  • block copolymers
  • confined assembly
  • photonic crystals
  • stimuli response

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Yang, Y., Kim, H., Xu, J., Hwang, M. S., Tian, D., Wang, K., Zhang, L., Liao, Y., Park, H. K., Yi, G. R., Xie, X., & Zhu, J. (2018). Responsive Block Copolymer Photonic Microspheres. Advanced Materials, 30(21), [1707344]. https://doi.org/10.1002/adma.201707344