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. 2021 Mar 15;11(3):738. doi: 10.3390/nano11030738

Figure 1.

Figure 1

Structure of the pristine graphene, the Stone–Wales (SW) defect graphene, the single vacancy (SV) graphene, and the double vacancy (DV) graphene prepared for density function theory (DFT) calculations and adsorption sites on graphene. (a) Bridge (red), Top (blue), and Hollow (green) on the pristine graphene. (b) Bridge 1–4, Top 5–7, and Hollow 8–9 on the SW defect graphene. (c) Bridge 1–4, Top 5–6, and Hollow 7–9 on the SV graphene. (d) Bridge 1–4, Top 5–8, and Hollow 9–10 on the DV graphene.