Chiral Electrode Behavior of Magneto-electrodeposited Silver Films

Mogi, Iwao; Watanabe, Kazuo

doi:10.2355/isijinternational.47.585

Cited by 27 publications

(23 citation statements)

References 14 publications

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“…Electrodeposition under magnetic fields (magnetoelectrodeposition; MED) induces surface chirality on silver and copper films, [1][2][3][4] and such films could serve as catalytic electrodes distinguishing the enantiomers of glucose, alanine and tartaric acid. In the MED processes, the Lorentz force acting on ionic currents causes the magnetohydrodynamic (MHD) flows.…”

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confidence: 99%

Communication—Visualization of Magnetohydrodynamic Micro-Vortices with Guanine Micro-Crystals

Mogi

Iwasaka

Aogaki

et al. 2017

J. Electrochem. Soc.

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Using guanine micro-crystals with light-reflective surfaces as a fluid tracer, magnetohydrodynamic (MHD) flows were visualized in silver electrodeposition under a magnetic field of 2 T. The trace of a guanine particle showed macroscopic MHD laminar flows at a low deposition current of 50 μA. On the contrary, at a high current of 200 μA, the trace exhibited a zigzag walk and vortex motion with the sizes of 100 ∼ 500 μm. This behavior demonstrates the existence of micro-MHD vortices that play a crucial role in chiral surface formation.

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confidence: 99%

Communication—Visualization of Magnetohydrodynamic Micro-Vortices with Guanine Micro-Crystals

Mogi

Iwasaka

Aogaki

et al. 2017

J. Electrochem. Soc.

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“…We have explored the chiral surface formation in magnetoelectrodeposition (MED) and found chiral behaviors in the MED films of silver 23,24 and copper. 2527 The chirality of MED films depends on the preparation conditions of magnetoelectrodeposition, including the magnetic field, electrodeposition potential, film thickness, and electrode diameters.…”

Section: Introductionmentioning

confidence: 99%

Tailoring of Surface Chirality by Micro-Vortices and Specific Adsorption in Magnetoelectrodeposition

Mogi

Aogaki

Watanabe

2015

Bulletin of the Chemical Society of Japan

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Solid surfaces often serve as a reaction field for organic molecules. If a surface has chirality, it could play a significant role as an enantioselective catalyst. Electrodeposition in magnetic fields (magnetoelectrodeposition; MED) has potential to produce enantioselective metal surfaces, however, the exploration of chiral formation conditions has not been sufficient in previous MED experiments. Here we show the chiral behaviors of copper film surfaces prepared by galvanostatic MED. We found that the chiral sign depends on both the deposition current and the polarity of magnetic field. Furthermore, we found that the specific adsorption of chloride ions on the film surfaces brings about drastic influence on the chiral formation in MED. At certain chloride concentrations chiral symmetry breaking was observed for the polarity of magnetic field. These findings imply that magnetohydrodynamic micro-vortices and the rate-limiting steps are responsible for the chiral surface formation.

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“…We have tried to explore chiral surfaces of magnetoelectrodeposited (MED) metal lms of Ag [3] and Cu [4,5]. The MED lms were employed as the electrodes, and the electrochemical reactions of chiral organic molecules * corresponding author; e-mail: mogi@imr.tohoku.ac.jp such as amino acids and tartaric acid were examined by voltammetry.…”

Section: Introductionmentioning

confidence: 99%

Chirality Induced by Magnetoelectrolysis

et al. 2014

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Surface chiral formation of Cu lms was investigated in the galvanostatic electrodeposition under a magnetic eld of 5 T perpendicular to the electrode surface. The surface chirality was examined by electrochemical voltammograms of a chiral molecule of tartaric acid. The chiral induction depended on the magnetoelectrodeposition time, and this implied that the formation of the self-organized state of magnetohydrodynamic ows around the electrode is crucial for the chiral formation.

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Chiral Electrode Behavior of Magneto-electrodeposited Silver Films

Cited by 27 publications

References 14 publications

Communication—Visualization of Magnetohydrodynamic Micro-Vortices with Guanine Micro-Crystals

Communication—Visualization of Magnetohydrodynamic Micro-Vortices with Guanine Micro-Crystals

Tailoring of Surface Chirality by Micro-Vortices and Specific Adsorption in Magnetoelectrodeposition

Chirality Induced by Magnetoelectrolysis

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