Fig. 4From: Recent biomedical advancements in graphene oxide- and reduced graphene oxide-based nanocomposite nanocarriersSchematic of graphene oxide (GO) functionalization with folic acid (FA)-linked polyethylene glycol (PEG) and preclinical screening tests for two tumor cell models. Notes: Reprinted with permission from de Sousa, Visani de Luna, Fonseca, Giorgio, and Alves. Folic-acid-functionalized graphene oxide nanocarriers: Synthetic approaches, characterization, drug delivery study, and antitumor screening. ACS Appl Nano Mater. 2018;1(2):922–932. [122] Copyright 2018, American Chemical SocietyBack to article page