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pH-Sensitive nanocargo based on smart polymer functionalized graphene oxide for site-specific drug deliveryElectronic supplementary information (ESI) available. See DOI: 10.1039/c3cp00008g

Graphene oxide (GO) was functionalized covalently with pH-sensitive poly(2-(diethylamino) ethyl methacrylate) (PDEA) by surface-initiated in situ atom transfer radical polymerization. The structure of the PDEA-grafted GO (GO-PDEA) were examined by Fourier-transform infrared spectroscopy, proton nucl...

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Bibliographic Details
Main Authors: Kavitha, Thangavelu, Haider Abdi, Syed Izhar, Park, Soo-Young
Format: Article
Language:English
Online Access:Get full text
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Summary:Graphene oxide (GO) was functionalized covalently with pH-sensitive poly(2-(diethylamino) ethyl methacrylate) (PDEA) by surface-initiated in situ atom transfer radical polymerization. The structure of the PDEA-grafted GO (GO-PDEA) were examined by Fourier-transform infrared spectroscopy, proton nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis and atomic force microscopy. The grafted PDEA endowed the GO sheets with good solubility and stability in physiological solutions. Simple physisorption by π-π stacking and hydrophobic interactions on GO-PDEA can be used to load camptothecin (CPT), a widely used water-insoluble cancer drug. The loaded CPT was released only at the lower (acidic) pH normally found in a tumor environment but not in basic and neutral pH. GO-PDEA did not show practical toxicity to N2a cancer cells but the GO-PDEA-CPT complex exhibited high potency in killing N2a cancer cells in vitro . These results suggest that the GO-PDEA nanocargo carrier might be a promising material for site-specific anticancer drug delivery and controlled release. PDEA-grafted graphene oxide is a promising material for site-specific anticancer drug delivery and controlled release.
ISSN:1463-9076
1463-9084
DOI:10.1039/c3cp00008g