Melting tungsten nanoparticles: a molecular dynamics study

@article{Moitra2008MeltingTN,
  title={Melting tungsten nanoparticles: a molecular dynamics study},
  author={Amitava Moitra and Sungho Kim and Jeffery Houze and Bohumir Jelinek and Seong Jin Park and R. M. German and Mark F. Horstemeyer and Seong-Gon Kim},
  journal={Journal of Physics D: Applied Physics},
  year={2008},
  volume={41},
  pages={185406}
}
We report a molecular dynamics simulation of melting of tungsten (W) nanoparticles. The modified embedded atom method interatomic potentials are used to describe the interaction between tungsten atoms. The melting temperature of unsupported tungsten nanoparticles of different sizes are found to decrease as the size of the particles decreases. The melting temperature obtained in this study is approximately a decreasing function of inverse radius, in good agreement with the predictions of… 
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33 Citations

33 Citations

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References

SHOWING 1-10 OF 73 REFERENCES
Thermal stability of unsupported gold nanoparticle: a molecular dynamics study
Three distinctive melting mechanisms in isolated nanoparticles
The melting properties of size-selected isolated silver nanoparticles of N = 13-3871 atoms are studied by using molecular dynamics simulations, Three distinctive melting mechanisms are identified.…
Melting of small gold particles: Mechanism and size effects.
TLDR
The authors' results provide for the first time a microscopic description of the melting transition of metal clusters, revealing in particular the formation of a liquid skin as precursor effect for Ng350.
Size-dependent melting point depression of nanostructures: Nanocalorimetric measurements
The melting behavior of 0.1\char21{}10-nm-thick discontinuous indium films formed by evaporation on amorphous silicon nitride is investigated by an ultrasensitive thin-film scanning calorimetry…
Melting of Pb nanocrystals
The size-dependent melting and surface melting of Pb nanocrystals is demonstrated by x-ray powder diffraction in ultrahigh vacuum. Whereas some prior studies have measured the size-dependent melting…
Small particle melting of pure metals
Thermodynamical size effect and the structure of metallic clusters
Size-Dependent Melting Properties of Small Tin Particles: Nanocalorimetric Measurements.
TLDR
The latent heat of fusion for Sn particles formed by evaporation on inert substrate with radii ranging from 5 to 50 nm has been measured directly using a novel scanning nanocalorimeter and a particle-size-dependent reduction of $\ensuremath{\Delta}{H}_{m}$ has been observed.
Melting point depression of Al clusters generated during the early stages of film growth: Nanocalorimetry measurements
This work investigates the thermodynamic properties of small structures of Al using an ultrasensitive thin-film differential scanning calorimeter. Al thin films were deposited onto a Si3N4 surface…
Melting line of aluminum from simulations of coexisting phases.
TLDR
Simulation of coexisting liquid and solid phases of aluminum as an efficient way of mapping out the coexistence line is performed, and it is indicated that the results are only weakly dependent upon the system size.
...
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