Figure 5.

Dispersibility of nrGO-PEG. (A) UV-vis absorption spectra of the nrGO-PEG aqueous dispersion. Inset: correlation of absorbance at 261 nm against concentration. (B) Photographs of nGO-PEG and nrGO-PEG solution in several solvents after storage at 4°C for 3 months.

Chen et al. Nanoscale Research Letters 2014 9:86   doi:10.1186/1556-276X-9-86
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