Abstract
In this paper, a novel one-pot strategy was utilized to immobilize gold nanorods (GNRs) onto the surface of PEGylated graphene oxide (GO-PEG) via polydopamine (PDA) to fabricate GNRs/GO@PDA hybrid nanosheets. The GNRs/GO@PDA nanosheets possessed excellent photostability and photothermal conversion efficiency (36.10%), due to the robust interfacial immobilization of PDA between GNRs and GO-PEG. Besides, GNRs/GO@PDA also could be utilized to be an efficient drug nano-vehicle that possessed an excellent loading ability for anticancer drug doxorubicin hydrochloride (DOX) (86.16%). Furthermore, the drug release of hybrid nanosheets could be triggered by pH value and near-infrared (NIR) light irradiation, which could be mainly ascribed to the strong π–π stacking interaction between GNRs/GO@PDA and DOX, as well as the brilliant NIR-responsive property of GNRs/GO@PDA. It was found that GNRs/GO@PDA possessed extremely low cytotoxicity to MCF-7 cells even at 250 μg mL−1, while GNRs/GO@PDA(DOX) showed obvious cytotoxicity at 100 μg mL−1. Thus, this paper presents a feasible strategy to fabricate GNRs/GO hybrid nanosheets with high drug loading capacity, excellent photothermal conversion property and pH/NIR-stimuli-responsive drug delivery performance, which possesses brilliant potentials to be an efficient platform for remotely triggered drug delivery.
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Acknowledgements
This work was financially supported by National Natural Science Foundation of China (Project U1704162) and Henan Provincial Natural Science Foundation of China (Project 162300410257).
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ZQ: Investigation, methodology, writing—original draft. JS: conceptualization, supervision, writing—review and editing, funding acquisition. BZ: investigation. JL: methodology. SC: validation, writing—review and editing
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Qi, Z., Shi, J., Zhu, B. et al. Gold nanorods/graphene oxide nanosheets immobilized by polydopamine for efficient remotely triggered drug delivery. J Mater Sci 55, 14530–14543 (2020). https://doi.org/10.1007/s10853-020-05050-2
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DOI: https://doi.org/10.1007/s10853-020-05050-2