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. 2019 Sep 23;9(10):1362. doi: 10.3390/nano9101362

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Nyquist plots of the porous ZnSe/CoSe₂/C composite nanofibers and bare ZnSe/CoSe₂ powders: (a) before cycling; and (b) after cycling of porous ZnSe/CoSe₂/C composite nanofibers.