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. 2018 Nov 14;9:4777. doi: 10.1038/s41467-018-07250-6

Fig. 2.

Fig. 2

Structural and compositional characterizations of MMSNs. a TEM image of MMSNs. Scale bar: 20 nm. b N2 adsorption−desorption isotherm and c corresponding pore-size distribution of MMSNs. d The hydrodynamic particle-size distribution of MMSNs in aqueous solution by DLS measurement. e Field-dependent magnetization curve of MMSNs measured at room temperature. f Plots of T2−1 versus Fe concentration and concentration-dependent T2-weighted MR imaging for MMSNs solution. Transverse relaxivity (r2) was derived from linear fitting of the plots