Figure 3From: Surface-enhanced Raman scattering of suspended monolayer graphenePeak positions. (a) G band and (b) 2D band of suspended and supported graphenes with Raman and SERS signals. (c) I2D/IG ratios of suspended and supported graphenes with Raman and SERS signals. (d) Enhancements of G and 2D bands of suspended and supported graphenes.Back to article page