Abstract
Chiral behavior of magnetoelectrodeposited (MED) Cu film electrodes was investigated for the electrochemical reactions of amino acids. The Cu films were electrodeposited under a magnetic field of 5 T perpendicular to the electrode surface. Such MED Cu films were employed as an electrode, and cyclic voltammograms were measured for the electrochemical reactions of several kinds of amino acids. Chiral behavior was clearly observed as oxidation current difference between the enantiomers of alanine, aspartic acid, and glutamic acid. The MED film electrodes with the thickness of 50~500 nm exhibited such chiral behavior, and their surface morphologies had network structures, which could be induced by the micro-MHD effect.
Highlights
IntroductionWhen a magnetic field is imposed to an electrodeposition process (magnetoelectrodeposition), the Lorentz force acting on the faradaic current causes convection of the electrolytic solution
When a magnetic field is imposed to an electrodeposition process, the Lorentz force acting on the faradaic current causes convection of the electrolytic solution
cyclic voltammograms (CVs) of several amino acids were examined on the MED Cu film electrodes
Summary
When a magnetic field is imposed to an electrodeposition process (magnetoelectrodeposition), the Lorentz force acting on the faradaic current causes convection of the electrolytic solution. This is well known as the magnetohydrodynamic (MHD) effect [1, 2]. Aogaki proposed the micro-MHD effect in the electrodeposition under the magnetic fields parallel to the faradaic current and perpendicular to the electrode surfaces [9]. The micro-MHD convection breaks the symmetry of mass transfer around the humps, and such symmetry breaking might lead to the formation of chiral structures on the deposit surfaces [11]. We report the magnetoelectrodeposition of Cu films and their characteristic chiral electrode behaviors for amino acids
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