Molybdenum nitride nanoparticles - high-resolution transmission electron microscopy study

J. Chaudhuri, L. Nyakiti, R. Lee, Y. Ma, P. Li, Q. L. Cui, L. H. Shen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The structure and size of molybdenum nitride nanoparticles were investigated using high-resolution transmission electron microscopy (HRTEM). Typical sizes of the particles were between 3 and 5 nm and they were mostly clustered together. High-resolution lattice imaging shows that the particles are single crystalline in nature and defect free. Two different phases of molybdenum nitride, γ-Mo2N (cubic) and δ-MoN (hexagonal) were identified. In addition, body centered cubic molybdenum phase was also present. It is anticipated that molybdenum is formed because of insufficient N2 supply or slow reaction rate. A mixture of γ-Mo2N and δ-MoN suggests the existence of a temperature gradient in the chamber leading to formation of γ-Mo2N at lower temperature (500 to 700 °C) and δ-MoN at higher temperature (850 °C).

Original languageEnglish
Pages (from-to)4763-4765
Number of pages3
JournalMaterials Letters
Volume61
Issue number26
DOIs
StatePublished - Oct 2007

Keywords

  • Crystal structure
  • High-resolution electron microscopy
  • Molybdenum nitride nanoparticles
  • Nanomaterials
  • Nanoparticles
  • dc arc charge system

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