Magnetic Field Effect on the Electrochemical Behavior of Hemoglobin

Abstract

The magnetic field effect on the electrochemical behavior of hemoglobin at the silver electrode was investigated by cyclic voltammetry. When a 0.4 T magnetic field was applied to the cell containing 1×10−6 M hemoglobin (pH 5.0), both anodic and cathodic peak currents increased observably at 10 mV/s due to the MHD convection. In addition, the influence of scan rate, adding promotor, increasing homoglobin concentration and removing oxygen on the peak currents under the magnetic field were investigated and analyzed with the classical MHD phenomena.

Influence of an external magnetic field on the formation of self-assembled monolayers of dodecanethiol on polycrystalline gold electrode

“…As for the mechanism of magnetic field effect on the acceleration of self-assembly process, it may be due to the magnetohydrodynamic (MHD) effect [14,15,17,19] and the orientation function of magnetic field on molecules [21,22]. Considering the MHD effect, it will lead to an increase of the limiting current density and improve the mass transport rate of electrochemical reactions owing to magnetically stimulated convection [14,15,17].…”

“…Considering the MHD effect, it will lead to an increase of the limiting current density and improve the mass transport rate of electrochemical reactions owing to magnetically stimulated convection [14,15,17]. Consequently, the formation rate of SAMs will be accelerated by the MHD effect.…”

“…Among other types of energies, magnetic field has been applied and has been shown to influence on electrochemical behavior of hemoglobin [14] and the systems Cu 2+ / Cu, Ni 2+ /Ni, [IrCl 6 ] 2− /[IrCl 6 ] 3− [15], charge transfer rate [16,17] and other reactions [18,19]. In the area of chemical synthesis, the possibility to control nanoparticle assembling process by applying a magnetic field has been used to fabricate electronic devices [20], while enhancement of the orientation of polymer chains under a magnetic field was also used in electrochemical polymerization [21,22].…”

Application of a gold electrode, modified by a self-assembled monolayer of 2-mercaptodecylhydroquinone, to the electroanalysis of hemoglobin

“…As an important protein participating in oxygen transfer within the vertebrate, hemoglobin has been extensively investigated by electrochemical techniques due to its redox heme group [9,10,11,12,13,14,15,16]. In order to promote the electrochemical response of hemoglobin, the silver electrodes modified by cysteine [17] and lipoic acid [18] monolayers have been utilized.…”