Fig. 4. (a) Three reaction routes for PEGylation of GNR@SiO2. (b) TEM image of GNR@SiO2. (c) 1H NMR spectra of free PEG calculated via the multi-Lorentzian-splitting algorithm after the three grafting-to processes reached equilibrium, along with the initial spectrum before the grafting process. (d) Corresponding σ calculated by the multi-Lorentzian-splitting algorithm for the three routes.
