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. 2019 May 14;7:335. doi: 10.3389/fchem.2019.00335

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Copyright © 2019 Zhang, Zhang and Huang.

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) EELS chemical mapping of Ti element in NMTN sample, (b) STEM-HADDF image of NMTN sample, (c) Enlarged image extracted from the blue rectangle of part b, (d) Enlarged image extracted from the red rectangle of part b, (e) vulnerable mechanism of naked samples and protective mechanism of NMTN sample under moisture condition. (f) XRD patterns of naked sample (left) and NMTN sample (right) before/after air-exposure, (g) cycling performance of naked sample and NMTN sample. Reproduced with permission (Guo et al., 2017). Copyright 2017, Nature Publishing Group.