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In view of preparing effective nitric oxide gas carriers, a fluorinated poly(ethylene glycol) ( F -PEG) was noncovalently conjugated with acid-treated graphene oxide (GO) to prepare the composite of F -PEG@GO. When the persistence of NO gas doped on GO and F -PEG@GO was investigated for 3 h, the conserved NO gas decreased from 49.00 ± 7.06 to 2.17 ± 1.36 nmol/mg carrier and from 58.51 ± 6.02 to 4.58 ± 2.22 nmol/mg carrier, respectively. The adsorption of F -PEG on GO and the doping of NO on GO and F -PEG@GO were declarative by the increase of distance between GO sheets, and the NO doping was also clarified by infrared absorption and X-ray photoelectron spectroscopies. The antibacterial effect was higher for NO-conserved F -PEG@GO than for NO-conserved GO and more effective agains Staphylococcus aureus han agains Escherichia coli . It is evident that the coating of F -PEG on GO is preferable for advancing the loading efficiency, the stability and the biomedical efficacy of NO gas.

Nitric Oxide Gas Delivery by Fluorinated Poly(Ethylene Glycol)@Graphene Oxide Carrier toward Pharmacotherapeutics