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. 2019 Jul 26;5(7):eaax1081. doi: 10.1126/sciadv.aax1081

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Copyright © 2019 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1 — (A) Dawson-type POM cluster. (B) Single-cluster nanowires. (C) Single-cluster nanoring. (D) Nanocolumn constructed by nanorings. (E) 3D superstructure assembled by nanorings.