Abstract
Mixed Zn(II)/Gd(III) oxide nanoparticles (~8 mole%Zn) with d(avg) of 2.1 nm were synthesized. The D-glucuronic acid coated Zn(II)/Gd(III) oxide nanoparticles showed a longitudinal water proton relaxivity (r₁) of 12.3 s⁻¹mM⁻¹ with r₂/r₁ = 1.1, corresponding to an ideal condition for T₁ MRI contrast agent. We attribute this to reduced magnetization of the mixed nanoparticles owing to non-magnetic Zn in the nanoparticles. Their effectiveness as a T₁ MRI contrast agent was confirmed by acquiring In Vivo T₁ MR images of a mouse after intravenous injection.
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