One-pot synthesis of co-substituted manganese oxide nanosheets and physical properties of lamellar aggregates

Kazuya Kai, Marine Cuisinier, Yukihiro Yoshida, Gunzi Saito, Yoji Kobayashi, Hiroshi Kageyama

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Co-substituted manganese oxide nanosheets, (Mn 1-xCo x)O 2 have been synthesized in the form of a colloidal suspension via a simple one-pot method. Substitution effects on the structural, optical absorption, and magnetic properties are investigated for the nanosheets and their lamellar aggregates. The composition of the (Mn 1-xCo x)O 2 nanosheets can be controlled continuously by adjusting the molar ratio of the starting materials. The solubility limit is x ∼ 0.20 based on the cell volume. In the 0.00 ≤ x ≤ 0.20 range, the band gap energy, magnetic moment, and Weiss temperature change systematically with x. The charge density of the (Mn,Co)O 2 layer is independent of x (i.e., [(Mn,Co)O 2] 0.2-) and the cobalt ions are trivalent in low-spin state.

Original languageEnglish
Pages (from-to)3855-3859
Number of pages5
JournalMaterials Research Bulletin
Issue number11
Publication statusPublished - 1 Nov 2012



  • A. Ceramics
  • A. Layered compounds
  • A. Thin films
  • B. Chemical synthesis
  • C. X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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