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. Author manuscript; available in PMC: 2014 Dec 1.
Published in final edited form as: Nat Protoc. 2013 Nov 7;8(12):10.1038/nprot.2013.146. doi: 10.1038/nprot.2013.146

Figure 1.

Figure 1

A schematic of Step 1 that includes preparation and surface functionalization of GO derivatives including GO, RGO, nRGO and RGO-IONP, as well as nGO-PEG, RGO-PEG, nRGO-PEG and RGO-IONP-PEG.