Journal of Physical Chemistry Letters
Journal of Physical Chemistry Letters
5 years ago

Magnetomigration of Rare-Earth Ions Triggered by Concentration Gradients

Magnetomigration of Rare-Earth Ions Triggered by Concentration Gradients
Jan Fransaer, Isadora R. Rodrigues, Sam Dehaeck, Pierre Colinet, Liubov Lukina, Koen Binnemans
Mach–Zehnder interferometry was applied to explore the effects of inhomogeneous magnetic fields on the mobility of rare-earth ions in aqueous solutions. No migration of ions was observed in a thermodynamically closed system when a homogeneous solution was subjected to a magnetic field gradient alone. However, magnetomigration could be triggered by a concentration gradient of the rare-earth ions in the solution. When a concentration gradient was introduced in the sample by solvent evaporation, consistent migration of paramagnetic Dy3+ ions from the bulk solution to regions with stronger magnetic fields was observed. By contrast, no movement was detected for diamagnetic Y3+ ions in the presence of a concentration gradient.

Publisher URL: http://dx.doi.org/10.1021/acs.jpclett.7b02226

DOI: 10.1021/acs.jpclett.7b02226

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