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. 2017 Jun 20;12:421. doi: 10.1186/s11671-017-2162-1

Fig. 1.

Fig. 1

FE-SEM images of a the as-spun PA 6 NFs. PA 6 NF coating by ALD ZnO at b 50, c 100, and d 150 cycles, respectively. e TEM image of the core-shell structure after 150 cycles of ALD ZnO coating NF