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Characterization and property of GAI@CP. (a) UV-VIS absorption spectra of GAI@CP, FRET-Pep, DSPE-PEG-FA and CPT. (b) TEM and SEM (inset) images of GAI@CP. (c) Zeta potentials of GA@CP, GAI@CP and AI@CP at different pH values. (d) Accumulative release of CPT from GAI@CP at pH 7.4, 6.8 and 5.0 in citrate buffer containing 10% FBS, respectively.
