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 language | English |
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Pages (from-to) | 4763-4765 |
Number of pages | 3 |
Journal | Materials Letters |
Volume | 61 |
Issue number | 26 |
DOIs | |
State | Published - Oct 2007 |
Keywords
- Crystal structure
- High-resolution electron microscopy
- Molybdenum nitride nanoparticles
- Nanomaterials
- Nanoparticles
- dc arc charge system