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. 2017 Mar 21;7:255. doi: 10.1038/s41598-017-00366-7

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© The Author(s) 2017

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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High resolution SEM images of Ag₂S@TiO₂ NFs with mean Ag₂S size of (a) 11 nm, (b) 17 nm, (c) 23 nm and (d) 40 nm. The Ag₂S size distribution is shown in the insets. A low magnification SEM image of the TiO₂ NFs is also shown as inset in (a).