Free and Partially Encapsulated Manganese Ferrite Nanoparticles in Multiwall Carbon Nanotubes

Saja Al-Khabouri, Salim Al-Harthi*, Toru Maekawa, Mohamed E. Elzain, Ashraf Al-Hinai, Ahmed D. Al-Rawas, Abbsher M. Gismelseed, Ali A. Yousif, Myo Tay Zar Myint

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Free and partially encapsulated manganese ferrite (MnFe2O4) nanoparticles are synthesized and characterized regarding structure, surface, and electronic and magnetic properties. The preparation method of partially encapsulated manganese ferrite enables the formation of a hybrid nanoparticle/tube system, which exhibits properties of manganese ferrite nanoparticles inside and attached to the external surface of the tubes. The effect of having manganese ferrite nanoparticles inside the tubes is observed as a shift in the X-ray diffraction peaks and as an increase in stress, hyperfine field, and coercivity when compared to free manganese ferrite nanoparticles. On the other hand, a strong charge transfer from the multiwall carbon nanotubes is attributed to the attachment of manganese ferrite nanoparticles outside the tubes, which is detected by a significant decrease in the σ band emission of the ultraviolet photoemission spectroscopy signal. This is followed by an increase in the density of states at the Fermi level of the attached manganese ferrite nanoparticles in comparison to free manganese ferrite nanoparticles, which leads to an enhancement of the metallic properties.

Original languageEnglish
Pages (from-to)1891-1904
Number of pages14
JournalBeilstein Journal of Nanotechnology
Publication statusPublished - 2020


  • carbon nanotubes
  • charge transfer
  • manganese ferrite
  • metallic nanoparticles
  • partial encapsulation
  • stress
  • surface

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering


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