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Lu JQ, Rider DA, Onyegam E, et al. Carbon nanotubes with small and tunable diameters from poly(ferrocenylsilane)-block-polysiloxane diblock copolymers. Langmuir. 2006;22(11):5174-9doi: 10.1021/la053308i.
Lu, J. Q., Rider, D. A., Onyegam, E., Wang, H., Winnik, M. A., Manners, I., Cheng, Q., Fu, Q., & Liu, J. (2006). Carbon nanotubes with small and tunable diameters from poly(ferrocenylsilane)-block-polysiloxane diblock copolymers. Langmuir : the ACS journal of surfaces and colloids, 22(11), 5174-9. https://doi.org/10.1021/la053308i
Lu, Jennifer Q, et al. "Carbon nanotubes with small and tunable diameters from poly(ferrocenylsilane)-block-polysiloxane diblock copolymers." Langmuir : the ACS journal of surfaces and colloids vol. 22,11 (2006): 5174-9. doi: https://doi.org/10.1021/la053308i
Lu JQ, Rider DA, Onyegam E, Wang H, Winnik MA, Manners I, Cheng Q, Fu Q, Liu J. Carbon nanotubes with small and tunable diameters from poly(ferrocenylsilane)-block-polysiloxane diblock copolymers. Langmuir. 2006 May 23;22(11):5174-9. doi: 10.1021/la053308i. PMID: 16700610.
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Langmuir. 2006 May 23;22(11):5174-9. doi: 10.1021/la053308i.

Carbon nanotubes with small and tunable diameters from poly(ferrocenylsilane)-block-polysiloxane diblock copolymers.

Langmuir : the ACS journal of surfaces and colloids

Jennifer Q Lu, David A Rider, Emanuel Onyegam, Hai Wang, Mitchell A Winnik, Ian Manners, Qian Cheng, Qiang Fu, Jie Liu

Affiliations

  1. Agilent Technologies, 3500 Deer Creek Road, Palo Alto, California, 94304, USA. [email protected]

PMID: 16700610 DOI: 10.1021/la053308i

Abstract

Iron-containing nanostructures produced from various self-assembled poly(ferrocenylsilane)-block-polysiloxane thin films are catalytically active for the initiation and growth of high density, small diameter carbon nanotubes (CNTs). Moreover, the tube diameter and density can be tuned by adjusting the chain lengths of the block copolymer. Iron-containing nanostructures from poly(ferrocenylmethylethylsilane)-b-poly(methylvinylsiloxane) polymer with 25 repeat units of an iron-containing segment and 265 repeat units of a non-iron-containing segment are able to produce CNTs with diameters around or less than 1 nm. Lithographically selective growth of CNTs across a large surface area has been demonstrated using this polymer system. Under the same growth condition, it has been found that the yield of defect-free CNTs varies with the size of the catalytically active nanostructures, which are dictated by the chain lengths of the two blocks. This result indicates that, for a specific-sized catalyst nanocluster, a unique set of growth conditions is required for synthesizing high yield, defect-free CNTs. This finding further addresses the importance of using uniform-sized catalyst-containing nanostructures for consistently achieving high-yield and high-quality CNTs with a minimum number of defects and amount of amorphous carbon.

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