Electrodeposited Fe and Fe-Au nanowires as MRI contrast agents

Electrodeposited Fe and Fe-Au nanowires were studied for potential as MRI contrast agents, especially for T-2-weighted imaging. Transverse relaxivities up to r(2) = 77.1 mM Fe-1 s(-1) (at 1.5 T) were achieved when Fe-Au nanowires were coated with thiol and carboxylic acid functionalized poly(ethyleneglycol). T-2-Weighted images (9 T) verified successful contrast.