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. 2016 Oct 7;6:34470. doi: 10.1038/srep34470

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Copyright © 2016, The Author(s)

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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SEM images of the printed and sintered layers of the (a–d) Ag NP and (e–h)Ag flake. (a) Hot air using Ag NP sample at 100 °C temperature and 60-s sintering time and IR-sintered layer with the following distances, IR lamp powers, and sintering times: (b) 50 mm, 500 W, and 1.08 s, respectively; (c) 50 mm, 500 W, and 5.4 s, respectively; and (d) 20 mm, 1000 W, and 1.08 s. respectively. (e) Hot-air-dried Ag flake layer at 100 °C temperature and 60-s sintering time and IR-sintered layer with distances, IR lamp powers, and sintering times of (f) 70 mm, 500 W, and 1.08 s, respectively; (g) 20 mm, 500 W, and 1.08 s, respectively; and (h) 20 mm, 1,000 W, and 10.8 s. Particle size calculation and fitted distribution of this histogram for (i) Ag NP and (j) Ag flake. (k) Pore area calculation based on image processing and graph of the pore area percentage as increments in the sintering conditions.