Viscous state effect on the activity of Fe nanocatalysts.
Abstract
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.
Type
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https://hdl.handle.net/10161/4101Published Version (Please cite this version)
10.1021/nn101883sPublication Info
Cervantes-Sodi, Felipe; McNicholas, Thomas P; Simmons, Jay G; Liu, Jie; Csányi, Gabor;
Ferrari, Andrea C; & Curtarolo, Stefano (2010). Viscous state effect on the activity of Fe nanocatalysts. ACS Nano, 4(11). pp. 6950-6956. 10.1021/nn101883s. Retrieved from https://hdl.handle.net/10161/4101.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Stefano Curtarolo
Professor in the Department of Mechanical Engineering and Materials Science
RESEARCH FIELDS
Artificial Intelligence Materials Science
Autonomous Materials Design
Computational Materials Science
High-Entropy Disordered and Amorphous Systems
Materials for Energy Applications
Materials for Aerospace Applications
Materials for Deep Space Exploration
The research is multidisciplinary and makes use of state of the art techniques from
fields like materials science, chemistry, physics,
Jie Liu
George Barth Geller Distinguished Professor of Chemistry
Dr. Liu’s research interests are focusing on the chemistry and material science of
nanoscale materials. Specific topics in his current research program include: Self-assembly
of nanostructures; Preparation and chemical functionalization of single
walled carbon nanotubes; Developing carbon nanotube based chemical and biological
sensors; SPM based fabrication and modification of functional nanostructures.
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