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. Author manuscript; available in PMC: 2015 Jul 7.
Published in final edited form as: Cancer Treat Res. 2015;166:51–83. doi: 10.1007/978-3-319-16555-4_3

Fig. 11.

Fig. 11

r2 relaxivity values of 12 nm nitrodopamine-PEG functionalized Fe3O4 MNS with molecular weight of PEG 200 (EG2), 400 (EG4), 500 (EG5), and 600 Da (EG6) in comparison to Ferumoxytol and Ferumoxides (unpublished). It was found that the PEG coating not only provides stability but the thickness of PEG coating also affects the r2 relaxivity of Fe3O4 MNS. The highest r value of 396 mM−1 s−1 with PEG 600 (EG6) was almost four times that of Feridex (Ferumoxide)