Figure 6
From: Contamination-free graphene by chemical vapor deposition in quartz furnaces
Representative AFM images of graphene transferred on Si/SiO2: (a) heavily contaminated sample grown in an aged quartz tube (>100 cycles), (b) clean sample grown in our modified CVD reactor. (c) Raman spectra of the two graphene samples (the D, G, 2D bands are peaked respectively at ~1348, 1580, 2692 cm−1).
