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. 2018 Nov 2;9:1254. doi: 10.3389/fphar.2018.01254

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Copyright © 2018 Hsiao, Huang and Lee.

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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Assessment of physicochemical properties of the RIPNDs. (A) SEM image of the RIPNDs at 2000X magnification. Scale bar = 500 nm. (B) The appearance of the real RIPND sample. (C) Photomicrographic image of the RIPNDs at magnification of ×400. Scale bar = 3 μm. (D) Size distribution profile of the RIPNDs measured by DLS. (E) Surface charge (ζ-potential) distribution profile of the RIPNDs detected by DLS.