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. 2017 Aug 23;3(8):e1700732. doi: 10.1126/sciadv.1700732

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Copyright © 2017 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. 4 — (A and B) FESEM images. Inset of (B) is a schematic model of the NF. (C and D) TEM images. (E) SAED pattern. (F) HRTEM image and the corresponding FFT image (inset).