fig1

Figure 1. Characterizations of the o-PDI, m-PDI, and p-PDI. (A-C) SEM. (D) Elemental analysis. (E) FT-IR. (F) XRD. (G-J) XPS. (K) TGA. (L and M) N2 adsorption/desorption curves and pore size distributions.
Figure 1. Characterizations of the o-PDI, m-PDI, and p-PDI. (A-C) SEM. (D) Elemental analysis. (E) FT-IR. (F) XRD. (G-J) XPS. (K) TGA. (L and M) N2 adsorption/desorption curves and pore size distributions.
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