Figure 3.

Peak 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.

Huang et al. Nanoscale Research Letters 2013 8:480   doi:10.1186/1556-276X-8-480
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