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(a) Graphene oxide (GO) was funtionalized with folic acid (FA) as a targeting molecule (FA-NGO), then loaded with anti-cancer drug, doxorubicin (DOX) or camptothecin (CPT). (b) FA-NGO was localized into MCF-7 (human breast cancer) cells, identified with fluorescent labeling with rhodamine. (c) Greater anti-cancer activity of DOX was observed when FA-NGO was used as a drug carrier. Reprinted with permission from ref. 39. Copyright 2010 Wiley-VCH Verlag GmbH & Co.
