Figure 5From: Facile and green reduction of covalently PEGylated nanographene oxide via a ‘water-only’ route for high-efficiency photothermal therapyDispersibility 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.Back to article page