Effect of Catalyst Pretreatment on Chirality-Selective Growth of Single-Walled Carbon Nanotubes

Effect of Catalyst Pretreatment on Chirality-Selective Growth of Single-Walled Carbon Nanotubes

We show that catalyst pretreatment conditions can have a profound effect on the chiral distribution in single-walled carbon nanotube chemical vapor deposition. Using a SiO2-supported cobalt model catalyst and pretreatment in NH3, we obtain a comparably narrowed chiral distribution with a downshifted...

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Veröffentlicht in:Journal of physical chemistry. C 2014-03, Vol.118 (11), p.5773-5781
Hauptverfasser: Fouquet, Martin, Bayer, Bernhard C, Esconjauregui, Santiago, Thomsen, Christian, Hofmann, Stephan, Robertson, John
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container_end_page 5781
container_issue 11
container_start_page 5773
container_title Journal of physical chemistry. C
container_volume 118
creator Fouquet, Martin
Bayer, Bernhard C
Esconjauregui, Santiago
Thomsen, Christian
Hofmann, Stephan
Robertson, John
description We show that catalyst pretreatment conditions can have a profound effect on the chiral distribution in single-walled carbon nanotube chemical vapor deposition. Using a SiO2-supported cobalt model catalyst and pretreatment in NH3, we obtain a comparably narrowed chiral distribution with a downshifted tube diameter range, independent of the hydrocarbon source. Our findings demonstrate that the state of the catalyst at the point of carbon nanotube nucleation is of fundamental importance for chiral control, thus identifying the pretreatment atmosphere as a key parameter for control of diameter and chirality distributions.
doi_str_mv 10.1021/jp4085348
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title Effect of Catalyst Pretreatment on Chirality-Selective Growth of Single-Walled Carbon Nanotubes
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