All wavelet transform (WT) spectra have a maximum intensity peak ~4.5 Å -1 and a second highest peak ~7. The above characterization of the synthesized Cr2O3 strongly suggests that the Cr2O3 is synthesized within the interlayer space of the rGO and thus restricted in two dimensions. If that is the case the Cr2O3 and rGO are synthesized in a sandwich structure and exfoliation should reveal sheets of rGO covered by 2D Cr2O3 on the basal plane. To test this, Cr2O3/rGO samples were re-exfoliated by sonication and drop casted onto Transmission Electron Microscopy (TEM) grids. TEM image of Cr2O3/rGO-1.8 V-15 min in Figure shows no formation of large bulk Cr2O3. However, the selected area electron diffraction (SAED) pattern of the white box area (inset of Figure ) exhibits two diffraction rings corresponding to (220) and (006) of Cr2O3 along with weak diffraction rings of rGO. This SAED pattern indicates that the dominant crystal plane of Cr2O3 is (11 � 0), parallel to the basal plane of rGO and the synthesized.