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. 2020 May 20;6(21):eaaz6107. doi: 10.1126/sciadv.aaz6107

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Copyright © 2020 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. 6 — (A) Solubility in water (the inset shows the photos captured under UV irradiation) [photo credit: Rui Tian (first author), Beijing University of Chemical Technology], (B) photostability under UV irradiation, (C) photographs of scalable preparation of TPEDB-PVA polymeric materials (radii of 0.5, 1.0, and 2.5 cm) [photo credit: Qi Xu (coauthor), Beijing University of Chemical Technology], (D) lifetime-dependent data encryption, and (E) digital coding written by TPEDB ink on PVA under and after UV irradiation.