Magnetic resonance imaging of the manipulation of a chemical wave using an inhomogeneous magnetic field

Robert Evans, C.R. Timmel, P.J. Hore, M.M. Britton

Research output: Contribution to journalArticle

Abstract

The effects of applied magnetic fields on the traveling wave formed by the reaction of (ethylenediaminetetraacetato)cobalt(II) (Co(II)EDTA2-) and hydrogen peroxide have been studied using magnetic resonance imaging (MRI). It was found that the wave could be manipulated by applying pulsed magnetic field gradients to a sample contained in a vertical cylindrical tube in the 7.0 T magnetic field of the spectrometer. Transverse field gradients decelerated the propagation of the wave down the high-field side of the tube and accelerated it down the low-field side. This control of the wave propagation eventually promoted the formation of a finger on the low-field side of the tube and allowed the wave to be maneuvered within the sample tube. The origin of these effects is rationalized by considering the Maxwell stress arising from the combined homogeneous and inhomogeneous magnetic fields and the magnetic susceptibility gradient across the wave front.

Original languageEnglish
Pages (from-to)7309-7314
Number of pages6
JournalJournal of American Chemical Society
Volume128
Issue number22
Early online date16 May 2006
DOIs
Publication statusPublished - 7 Jun 2006

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