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. 2019 Sep 23;14:7759–7780. doi: 10.2147/IJN.S221433

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© 2019 Rostami et al.

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The top scheme indicates fabrication of UCNPs@CCPEB and loading the siRNA process. The bottom scheme indicates the procedure of releasing the siRNA and PDT simultaneously under NIR excitation and UV/visible emission from UCNPs. Reproduced with permission from Zhao H, Hu W, Ma H, et al. Photo-induced charge-variable conjugated polyelectrolyte brushes encapsulating upconversion nanoparticles for promoted siRNA release and collaborative photodynamic therapy under NIR light irradiation. Reproduced from Zhao H, Hu W, Ma H, et al. Photo-induced charge-variable conjugated polyelectrolyte brushes encapsulating upconversion nanoparticles for promoted siRNA release and collaborative photodynamic therapy under NIR light irradiation. Adv Funct Mater. 2017;27(44):1702592¹⁷⁰ Copyright John Wiley and Sons.