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. 2021 Aug 24;9:747637. doi: 10.3389/fbioe.2021.747637

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Copyright © 2021 Zuo, Wang, An, Wang, Zheng, Shao and Zhang.

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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Scheme of PC NDs preparation and its characterization. (A) Scheme of PC NDs preparation. PC NDs has been prepared using a reprecipitation method and shown pH-sensitive drug release behavior in tumor cells. (B) TEM images of PC NDs. Scale bars are 200 and 50 nm (inset), respectively. (C) SEM image of PC NDs. Scale bar is 200 nm. (D) Emission spectra of Cur, PTX/Cur mix, and PC NDs. (E) UV-vis absorption spectra of Cur, PTX, PTX/Cur mix, and PC NDs. (F) FTIR spectra of Cur, PTX, and PC NDs. (G) XRD spectra of Cur, PTX, and PC NDs.