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. 2018 Sep;51:774–785. doi: 10.1016/j.nanoen.2018.07.020

Fig. 4.

Fig. 4

SEM images of hydrothermally synthesized copper selenide microcrystals into water/ethylene glycol/PVP solvent at 230 °C reaction temperature with (a) 1% and (b) 2% of Ag doping with corresponding EDAX images and elemental mapping. The rest of the material is carbon from the conducting adhesive tape used for securing the sample.