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Graphitic encapsula...
Graphitic encapsulation of catalyst particles in carbon nanotube production
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- Ding, Feng, 1970 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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- Rosen, Arne, 1939 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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- Campbell, Eleanor E B, 1960 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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- Falk, Lena, 1956 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bolton, Kim, 1964 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),University of Gothenburg
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(creator_code:org_t)
- 2006-03-24
- 2006
- Engelska.
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Ingår i: Journal of Physical Chemistry B. - : American Chemical Society (ACS). - 1520-5207 .- 1520-6106. ; 110:15, s. 7666-7670
- Relaterad länk:
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http://dx.doi.org/10...
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https://research.cha...
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https://doi.org/10.1...
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https://gup.ub.gu.se...
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Abstract
Ämnesord
Stäng
- A new model is proposed for the encapsulation of catalyst metal particles by graphite layers that are obtained, for example, in low-temperature chemical vapor deposition production of carbon nanotubes (CNTs). In this model graphite layers are primarily formed from the dissolved carbon atoms in the metal-carbide particle when the particle cools. This mechanism is in good agreement with molecular dynamics simulations (which show that precipitated carbon atoms preferentially form graphite sheets instead of CNTs at low temperatures) and experimental results (e.g., encapsulated metal particles are found in low-temperature zones and CNTs in high-temperature regions of production apparatus, very small catalyst particles are generally not encapsulated, and the ratio of the number of graphitic layers to the diameter of the catalyst particle is typically 0.25 nm(-1)).
Ämnesord
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- MAGNETIC-PROPERTIES
- SWNT GROWTH
- NANOPARTICLES
- NI
- SINGLE-WALLED NANOTUBES
- SIZE
- MOLECULAR-DYNAMICS
- METAL PARTICLES
- GAS-PHASE
- NANOCAPSULES
- SINGLE-WALLED NANOTUBES; METAL PARTICLES; MAGNETIC-PROPERTIES; MOLECULAR-DYNAMICS; SWNT GROWTH; GAS-PHASE; NANOPARTICLES; NANOCAPSULES; SIZE; NI
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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