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. 2009 Mar 19;106(15):6065–6070. doi: 10.1073/pnas.0811923106

Fig. 1.

Fig. 1.

Characterization of BPE-PTCDI MWs. (A) A SEM image of BPE-PTCDI MWs synthesized by the nonsolvent nucleation method. (Inset) The chemical structure of BPE-PTCDI. (B) A TEM image of BPE-PTCDI MWs. (C) Photographs displaying BPE-PTCDI MW dispersion in ethyl alcohol. (D) A TEM bright-field image with a selected area aperture of a single BPE-PTCDI MW. (Inset) the corresponding selected area electron diffraction (SAED) pattern and the molecular packing motif of a BPE-PTCDI MW, where BPE-PTCDI molecules have a slipped π-stacking structure along the long axis (the a axis) of the MW. The shortest vertical distance between the aromatic rings stacked along the a axis is 3.4 Å.