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(a) Dispersion stability of GNRs at different exposure levels of 5 kDa mPEG-thiol. Intensities are normalized for a comparison between mode peaks as a function of preparation conditions. All mPEG-GNR samples were diluted 20–30-fold prior to NTA. (b) mPEG-thiol concentrations below 15 μM (0.075 mg/mL) were insufficient to produce fully dispersed GNRs, based on NTA.
