Preparation of Single- and Few-Layer Graphene Sheets Using Co Deposition on SiC Substrate

Figure 5

Raman mapping data for an area of 20 × 20 μm²: (a) D-peak (1350 cm⁻¹) intensity, (b) G-peak (1600 cm⁻¹) intensity, (c) 2D-peak (2700 cm⁻¹) intensity, (d) Intensity ratio of the G-peak to the 2D-peak.

(a)

(b)

(c)

(d)