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Use of ultrasound-assisted co-precipitation route to obtain CuMnO2 semiconductor nanomaterials

  • Maria Poienar
  • Antoanetta Lungu
  • Paula SfirloagaEmail author
  • Mihai Lungu
  • Ciprian Valentin Mihali
  • Paulina Vlazan
Original Paper

Abstract

CuMnO2 nanoparticles were obtained for the first time by sonochemical synthesis in an aqueous solution of sodium hydroxide containing soluble copper and manganese nitrate reactants without any further thermal treatment. Experiments were performed at different lengths of time (20 min, 30 and 40 min) and ultrasound amplitude of 80%. The materials present the expected crednerite structure (C2/m space group), and the nanoparticles average size and morphology for each sample are studied by nanoparticle tracking analysis method, respectively, by transmission electron microscopy. The as-obtained materials display p-type semiconductivity behavior at room temperature and the value for direct optical band gap EG is estimated to be approximately ~ 3.6 eV. The study of the magnetic properties for the nanocrystalline crednerite samples reveals 2D magnetic behavior below 110 K and a weak ferromagnetic component at ~ 20 K.

Keywords

Ultrasound Crednerite Nanoparticles Magnetism 

Notes

Acknowledgments

This work was supported by a grant of the Romanian National Authority for Scientific Research and Innovation, CNCS–UEFISCDI, Project Number PN-II-RU-TE-2014-4-2179. The authors thank A. Dabici, C. Ianasi and D. Ursu for help during the materials characterisation.

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Copyright information

© Institute of Chemistry, Slovak Academy of Sciences 2019

Authors and Affiliations

  • Maria Poienar
    • 1
  • Antoanetta Lungu
    • 1
  • Paula Sfirloaga
    • 1
    Email author
  • Mihai Lungu
    • 2
  • Ciprian Valentin Mihali
    • 3
  • Paulina Vlazan
    • 1
  1. 1.Institute for Research and Development in Electrochemistry and Condensed MatterTimisoaraRomania
  2. 2.Faculty of PhysicsWest University of TimisoaraTimisoaraRomania
  3. 3.Institute of Life Sciences“Vasile Goldis” Western University of AradAradRomania

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