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. 2016 Aug 12;5(8):e16136. doi: 10.1038/lsa.2016.136

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Copyright © 2016 CIOMP

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 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-nc-nd/4.0/

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(a) Normalized UC emission spectra of (a) the PS nanofibrous membrane; (b) the NaYF₄:Yb³⁺, Tm³⁺/PS HFM and (c) the NaYF₄:Yb³⁺, Tm³⁺ NPs dispersed in DMF solution. The insets show the corresponding optical images obtained under natural-light or 980-nm LD irradiation. (b) Normalized UC emission spectra of (a) the NaYF₄:Yb³⁺, Er³⁺/PS HFM and (b) the NaYF₄:Yb³⁺, Er³⁺ NPs dispersed in DMF solution. The insets show the corresponding optical images obtained under natural-light or 980-nm LD irradiation. (c) Contact angles and the corresponding optical profiles (and image) of water droplets on the different positions of the HFM surface; (d) Optical images of the tailored HFM with different morphologies.