Breaking of odd chirality in magnetoelectrodeposition of copper films on micro-electrodes

Iwao Mogi, Ryoichi Aogaki, Kohki Takahashi

Research output: Contribution to journalArticlepeer-review

Abstract

The surface chirality was investigated in magnetoelectrodeposition (MED) of copper films on micro-disc electrodes with the diameters of 100 and 25 µm. The MED was conducted in the magnetic fields of 1–5 T, which were parallel or antiparallel to the ionic currents. In the case of 100 µm-electrodes, the MED films prepared in 2 and 3 T exhibited odd chirality for the magnetic field polarity, as expected in the magnetohydrodynamic (MHD) vortex model. However, the films prepared in the higher fields of 4 and 5 T exhibited breaking of odd chirality. In the case of the 25 µm-electrode, the broken odd chirality was observed in 2 and 3 T. These results indicate that the strong vertical MHD flows induce the breaking of odd chirality. The mapping of chiral symmetry on the axes of the magnetic field and electrode diameter demonstrate that the odd chirality could be easily broken by the fluctuation of micro-MHD vortices.

Original languageEnglish
Article number142
JournalMagnetochemistry
Volume7
Issue number11
DOIs
Publication statusPublished - 2021 Nov

Keywords

  • Alanine
  • Chiral symmetry breaking
  • Magnetoelectrodeposition
  • Micro-electrode
  • Micro-MHD vortex
  • Surface chirality

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Materials Chemistry
  • Electronic, Optical and Magnetic Materials

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