Fig 4. Release of FITC from NPs (A) and average hydrodynamic (B) of NPs.
A: Release of FITC from FITC/FA@[Fe3O4@Au] NPs. B: The average hydrodynamic diameter of [Fe3O4@Au] and FITC/FA@[Fe3O4@Au] NPs at pH = 7.4.
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