Table 1.

Biocompatibility of Surface Functionalized GO

Surface Coating	Findings	References
Polyethylene glycol (PEG)	GO shows no toxicity towards J774A.1 murine macrophage cell line at concentrations up to 100 µg/mL at 24 hours of exposure	Xu et al 201815
Poly (amido amine) (PAMAM)	GO shows good biocompatibility to the SMMC-7721 human hepatocarcinoma cells with 93% viability at a concentration of 200 µg/mL upon 24 hours of exposure	Liu et al 201816
Dextran	Highly compatible, no toxicity up to 450 µg/mL (80% viability) in HeLa human cervical carcinoma cells	Kim et al 201117