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. 2020 Feb 28;8:123. doi: 10.3389/fchem.2020.00123

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Copyright © 2020 Jia, Sun, Zhang, Liu, Cao, Huang, Xing, Zhang, Zhang and Cao.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Aqoeous solution of CQDs under sunlight and UV light (the left cuvette is CQDs-N10-Y solution, the middle cuvette is CQDs-N20-G solution and the right cuvette is CQDs-N20-G solution). The TEM images, HRTEM images, and size distributions of (B) CQDs-N10-Y, (C) CQDs-N20-G, and (D) CQDs-N30-B.