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Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes

Mass-selected, ligand-free Fe(N) clusters with N = 10–30 atoms (cluster diameter: 0.6–0.9 nm) were implanted into [Al@SiO(x)] surfaces at a low surface coverage corresponding to a few thousandths up to a few hundredths of a monolayer in order to avoid initial cluster agglomeration. These studies are...

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Autores principales: Joshi, Ravi, Waldschmidt, Benjamin, Engstler, Jörg, Schäfer, Rolf, Schneider, Jörg J
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Beilstein-Institut 2011
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257497/
https://www.ncbi.nlm.nih.gov/pubmed/22259755
http://dx.doi.org/10.3762/bjnano.2.80
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author Joshi, Ravi
Waldschmidt, Benjamin
Engstler, Jörg
Schäfer, Rolf
Schneider, Jörg J
author_facet Joshi, Ravi
Waldschmidt, Benjamin
Engstler, Jörg
Schäfer, Rolf
Schneider, Jörg J
author_sort Joshi, Ravi
collection PubMed
description Mass-selected, ligand-free Fe(N) clusters with N = 10–30 atoms (cluster diameter: 0.6–0.9 nm) were implanted into [Al@SiO(x)] surfaces at a low surface coverage corresponding to a few thousandths up to a few hundredths of a monolayer in order to avoid initial cluster agglomeration. These studies are aimed towards gaining an insight into the lower limit of the size regime of carbon nanotube (CNT) growth by employing size-selected sub-nm iron clusters as catalyst or precatalyst precursors for CNT growth. Agglomeration of sub-nm iron clusters to iron nanoparticles with a median size range between three and six nanometres and the CNT formation hence can be observed at CVD growth temperatures of 750 °C. Below 600 °C, no CNT growth is observed.
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spelling pubmed-32574972012-01-18 Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes Joshi, Ravi Waldschmidt, Benjamin Engstler, Jörg Schäfer, Rolf Schneider, Jörg J Beilstein J Nanotechnol Full Research Paper Mass-selected, ligand-free Fe(N) clusters with N = 10–30 atoms (cluster diameter: 0.6–0.9 nm) were implanted into [Al@SiO(x)] surfaces at a low surface coverage corresponding to a few thousandths up to a few hundredths of a monolayer in order to avoid initial cluster agglomeration. These studies are aimed towards gaining an insight into the lower limit of the size regime of carbon nanotube (CNT) growth by employing size-selected sub-nm iron clusters as catalyst or precatalyst precursors for CNT growth. Agglomeration of sub-nm iron clusters to iron nanoparticles with a median size range between three and six nanometres and the CNT formation hence can be observed at CVD growth temperatures of 750 °C. Below 600 °C, no CNT growth is observed. Beilstein-Institut 2011-11-01 /pmc/articles/PMC3257497/ /pubmed/22259755 http://dx.doi.org/10.3762/bjnano.2.80 Text en Copyright © 2011, Joshi et al. https://creativecommons.org/licenses/by/2.0https://www.beilstein-journals.org/bjnano/termsThis is an Open Access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Nanotechnology terms and conditions: (https://www.beilstein-journals.org/bjnano/terms)
spellingShingle Full Research Paper
Joshi, Ravi
Waldschmidt, Benjamin
Engstler, Jörg
Schäfer, Rolf
Schneider, Jörg J
Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes
title Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes
title_full Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes
title_fullStr Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes
title_full_unstemmed Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes
title_short Generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes
title_sort generation and agglomeration behaviour of size-selected sub-nm iron clusters as catalysts for the growth of carbon nanotubes
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257497/
https://www.ncbi.nlm.nih.gov/pubmed/22259755
http://dx.doi.org/10.3762/bjnano.2.80
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