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Kang HS, Park C, Eoh H, Lee CE, Ryu DY, Kang Y, Feng X, Huh J, Thomas EL, Park C. Visualization of nonsingular defect enabling rapid control of structural color. Sci Adv 2022; 8:eabm5120. [PMID: 35275730 PMCID: PMC8916736 DOI: 10.1126/sciadv.abm5120] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Stimuli-interactive structural color (SC) of a block copolymer (BCP) photonic crystal (PC) uses reversible alteration of the PC using external fluids and applied forces. The origin of the diffusional pathways of a stimulating fluid into a BCP PC has not been examined. Here, we directly visualize the vertically oriented screw dislocations in a one-dimensional lamellar BCP PC that facilitate the rapid response of visible SC. To reveal the diffusional pathway of the solvent via the dislocations, BCP lamellae are swollen with an interpenetrated hydrogel network, allowing fixation of the swollen state and subsequent microscopic examination. The visualized defects are low-energy helicoidal screw dislocations having unique, nonsingular cores. Location and areal density of these dislocations are determined by periodic concentric topographic nanopatterns of the upper surface-reconstructed layer. The nonsingular nature of the interlayer connectivity in the core region demonstrates the beneficial nature of these defects on sensing dynamics.
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Affiliation(s)
- Han Sol Kang
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Chanho Park
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Hongkyu Eoh
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - Chang Eun Lee
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Du Yeol Ryu
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Youngjong Kang
- Department of Chemistry, Research Institute for Natural Sciences Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Republic of Korea
| | - Xuenyan Feng
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
| | - June Huh
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
- Division of Life Sciences, Korea University, 145 Anam-Ro, Seongbuk-Gu, Seoul 02841, Republic of Korea
- Corresponding author. (C.P.); (E.L.T.); (J.H.)
| | - Edwin L. Thomas
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA
- Corresponding author. (C.P.); (E.L.T.); (J.H.)
| | - Cheolmin Park
- Department of Materials Science and Engineering, Yonsei University, Seoul 03722, Republic of Korea
- Spin Convergence Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea
- Corresponding author. (C.P.); (E.L.T.); (J.H.)
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