Figure 2.

Schematic illustration of two-step functionalization. (A) Electrochemical grafting or chemical grafting of 4-carboxyl phenyl diazonium. (B) Carbodiimide coupling of Direct Blue 71 dye.

Zhan et al. Nanoscale Research Letters 2013 8:279   doi:10.1186/1556-276X-8-279
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