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. Author manuscript; available in PMC: 2015 Sep 16.
Published in final edited form as: ACS Nano. 2014 Sep 19;8(10):10168–10177. doi: 10.1021/nn502986e

Figure 3.

Figure 3

(a) GO adsorbed a variety of molecules in cell culture media with amines (9, 10, 11, 13) producing the strongest interaction. (b) GO sedimentation induced by molecular adsorption was measured by the fraction of GO remaining in the supernatant after centrifugation at varying speeds. The area under each curve can be used to quantify sedimentation. (c) In cell culture, co-incubation with GO enhanced the cellular delivery of a variety of molecules up to 13-fold. The Gd(III) and GO incubation concentrations were 188 µM and 18.8 µg/mL, respectively. Error bars show SEM.