The authors regret the exclusion of a reference in the caption to Fig. 1 in the original manuscript. However, the same reference is cited in Sec. II A of the manuscript. The figure caption with reference citation is provided below.
This error does not alter the scientific conclusions and results of the study in any aspects. The authors would like to apologize for any inconvenience caused.
FIG. 1. Characterization of DIONPs. (a) TEM image of DIONPs indicates particles to be spherical in shape with an average core diameter of ∼9 nm. (b) Mean hydrodynamic diameter of DIONPs measured by DLS in water indicates a mean size of ∼25 nm. (c) Mean hydrodynamic diameter of DIONPs in complete culture media measured by DLS shows a mean size of ∼123 nm. (d) XRD spectra of DIONPs shows several distinct peaks characteristic of spinel ferrite configuration. (e) FTIR analysis demonstrates dextran coating on the surface of iron oxide nanoparticles. [Data used from S. L. Easo and P. V. Mohanan, Carbohydr. Polym. 92, 726 (2013).]