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. Author manuscript; available in PMC: 2015 Jun 4.
Published in final edited form as: J Mater Chem. 2012 Oct 16;22(43):22848–22850. doi: 10.1039/C2JM35116A

Fig. 2.

Fig. 2

1H r1 relaxivities of Gd-DOTA complex in solution (2.01 ± 0.14 mM−1 s−1), Gd-DOTA-MSNs prepared with different percentage Gd loadings (1.37 wt% Gd: 33.57 ± 1.29 mM−1 s−1; 2.07 wt% Gd: 19.61 ± 1.51 mM−1 s−1; 3.82 wt% Gd: 14.22 ± 0.67 mM−1 s−1) and biomodified Gd-DOTA-MSNs (26.69 ± 0.43 mM−1 s−1),27 measured at 7 T. Upper inset shows corresponding T1-weighted phantom images of aqueous MSN samples with [Gd] 0.04 mM (TR = 30 ms; TE = 5 ms; slice thickness = 2 mm; matrix = 256 × 256, at 20 ° C).