Viscous state effect on the activity of Fe nanocatalysts.
Journal Article (Journal Article)
Many applications of nanotubes and nanowires require controlled bottom-up engineering of these nanostructures. In catalytic chemical vapor deposition, the thermo-kinetic state of the nanocatalysts near the melting point is one of the factors ruling the morphology of the grown structures. We present theoretical and experimental evidence of a viscous state for nanoparticles near their melting point. The state exists over a temperature range scaling inversely with the catalyst size, resulting in enhanced self-diffusion and fluidity across the solid-liquid transformation. The overall effect of this phenomenon on the growth of nanotubes is that, for a given temperature, smaller nanoparticles have a larger reaction rate than larger catalysts.
Full Text
Duke Authors
Cited Authors
- Cervantes-Sodi, F; McNicholas, TP; Simmons, JG; Liu, J; Csányi, G; Ferrari, AC; Curtarolo, S
Published Date
- November 2010
Published In
Volume / Issue
- 4 / 11
Start / End Page
- 6950 - 6956
PubMed ID
- 20964288
Pubmed Central ID
- 20964288
Electronic International Standard Serial Number (EISSN)
- 1936-086X
International Standard Serial Number (ISSN)
- 1936-0851
Digital Object Identifier (DOI)
- 10.1021/nn101883s
Language
- eng