Preparation of Three-Layer Graphene Sheets from Asphaltenes Using a Montmorillonite Template

Figure 3

AFM image (a) and height profiles (b, c) of the asphaltene-derived graphene sheet. SEM (d, e) and TEM (f, g) images of the asphaltene-derived graphene sheets.

(a)

(b)

(c)

(d)

(e)

(f)

(g)