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. 2019 Apr 2;9:5527. doi: 10.1038/s41598-019-41909-4

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Sheet resistances of the spin-coated Ag NWs with increasing pre-annealing treatment temperature (a) before and after UV/O₃ treatment for 2 h and (b) after UV/O₃ treatment for 4 h, (c) sheet resistance ratios as functions of the UV/O₃ treatment times for the Ag NWs with and without GO treatment. Scanning electron microscopy images of (d) Ag NWs spin-coated on PET substrates, (e) Ag NWs thermally annealed at 90 °C for 10 min, (f) Ag NWs UV/O₃ treated for 9 h, (g) Ag NWs bar coated on a PET substrate, (h) Ag NWs UV/O₃-treated for 9 h, and (i) GO-treated Ag NWs. The yellow dotted circles in (e) represents the disconnected regions of the Ag NWs after thermal annealing.