Saravanan G, Fujio K, Ozeki S. Magnetic field effects on electric behavior of [Fe(CN)
6]
3- at bare and membrane-coated electrodes.
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2008;
9:024209. [PMID:
27877960 PMCID:
PMC5099717 DOI:
10.1088/1468-6996/9/2/024209]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2007] [Revised: 05/20/2008] [Accepted: 12/17/2007] [Indexed: 05/31/2023]
Abstract
The cyclic voltammetric behavior of [Fe(CN)6]3- was investigated under homogeneous magnetic fields perpendicular to the electrode surface in order to determine the effects of magnetic fields on the distribution of an Fe2+/Fe3+ redox couple. The cathodic current was enhanced much more than the anodic current by a homogeneous magnetic field, suggesting that the concentration gradient of paramagnetic [Fe(CN)6]3- and diamagnetic [Fe(CN)6]4- formed at an electrode surface may also contribute to the asymmetric current. The apparent diffusion coefficient of the redox couple increased by over 30% in both cathodic and anodic processes upon applying a magnetic field. For a gold electrode coated with dioctadecyldimethylammonium, the application of a magnetic field perpendicular to the surface increased the peak-to-peak separation, and enhanced the asymmetric current. It is inferred that the application of a magnetic field promotes the electron-tunneling process by tilting chain molecules in the barrier membrane.
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