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. 2017 Sep 14;7:11535. doi: 10.1038/s41598-017-11698-9

Figure 1.

Figure 1

(a,b) Structure diagrams of GDY and N-GDY. (c,d) Optical photographs of the GDY powders without and with nitrogen doping respectively. (e,f) Raman spectrum of pristine and N-doping GDY.