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Preparation of graphene oxide (GO)–polyethylene glycol (PEG)/paclitaxel (PTX) nanoscale drug delivery system [140]. (Reprinted with permission from Zhiyuan Xu et al. ‘Covalent Functionalization of Graphene Oxide with Biocompatible Poly(ethylene glycol) for Delivery of Paclitaxel’. ACS Appl. Mater. Interfaces 2014, 6, 17268−17276. Copyright (2020) American Chemical Society).
