Bulk properties of crystalline single wall carbon nanotubes: Purification, pressure effects and transport
作者:
J. E. Fischer,
R. S. Lee,
H. J. Kim,
A. G. Rinzler,
R. E. Smalley,
S. L. Yaguzhinski,
A. D. Bozhko,
D. E. Sklovsky,
V. A. Nalimova,
期刊:
AIP Conference Proceedings
(AIP Available online 1998)
卷期:
Volume 442,
issue 1
页码: 34-38
ISSN:0094-243X
年代: 1998
DOI:10.1063/1.56530
出版商: AIP
数据来源: AIP
摘要:
Pulsed laser ablation (PLA) has been scaled up to yield several grams/day of single-walled nanotubes. Annealed, purified material is highly crystalline, essentially free of amorphous carbon, fullerenes and catalyst residues, and about 3 times denser than the highly porous, as-grown product. In principle the interactions between tubes in a rope, and/or between rope crystallites, may be “tuned” by 3 different approaches—chemical doping, hydrostatic pressure, or purification/annealing, all of which have a dramatic effect on the temperature dependence of resistivity. In particular, we suggest that the crossover from positive to negative dR/dT at low temperature is a 3D effect and not an intrinsic property of isolated neutral SWNT. ©1998 American Institute of Physics.
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