Synthesis and characterization of single-walled nanotubes produced with Ce/Ni as catalysts

Bingbing Liu; T. Wågberg; Eva Olsson; Ruseng Yang; Hongdong Li; Shulin Zhang; Haibin Yang; Guangtian Zou; B. Sundqvist

doi:10.1016/S0009-2614(00)00235-9

Synthesis and characterization of single-walled nanotubes produced with Ce/Ni as catalysts

Bingbing Liu, T. Wågberg, Eva Olsson, Ruseng Yang, Hongdong Li, Shulin Zhang, Haibin Yang, Guangtian Zou, B. Sundqvist

Research output: Contribution to journal › Article › peer-review

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Abstract

SWNTs were synthesized in high yield in the presence of Ce/Ni as catalyst. Raman and SEM results show that a fraction of the tubes are chiral and have small diameters (the snallest one is 0.79 nm), indicating that Ce plays an important role in the formation. Acid treatment is effective in eliminating impurities but changes the morphology and the electric resistance of mats with increasing treatment time. The resistance of as-grown and short time acid-treated mats follow a 2D VRH behaviour while mats treated for a long time follow a 3D model. The results indicate that hopping conduction occurs on bundles or on tubes and that there are intrinsic links between tubes in as-grown mats.

Original language	English (US)
Pages (from-to)	365-372
Number of pages	8
Journal	Chemical Physics Letters
Volume	320
Issue number	3-4
DOIs	https://doi.org/10.1016/S0009-2614(00)00235-9
State	Published - Apr 7 2000
Externally published	Yes

Bibliographical note

Funding Information:
B.B.L. would like to thank the Wenner-Gren foundation for financial aid. This work was financially supported by the Swedish Research Councils for Natural Sciences (NFR) and Engineering Sciences (TFR) and by the Chinese Natural Science Foundation.

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title = "Synthesis and characterization of single-walled nanotubes produced with Ce/Ni as catalysts",

abstract = "SWNTs were synthesized in high yield in the presence of Ce/Ni as catalyst. Raman and SEM results show that a fraction of the tubes are chiral and have small diameters (the snallest one is 0.79 nm), indicating that Ce plays an important role in the formation. Acid treatment is effective in eliminating impurities but changes the morphology and the electric resistance of mats with increasing treatment time. The resistance of as-grown and short time acid-treated mats follow a 2D VRH behaviour while mats treated for a long time follow a 3D model. The results indicate that hopping conduction occurs on bundles or on tubes and that there are intrinsic links between tubes in as-grown mats.",

author = "Bingbing Liu and T. W{\aa}gberg and Eva Olsson and Ruseng Yang and Hongdong Li and Shulin Zhang and Haibin Yang and Guangtian Zou and B. Sundqvist",

note = "Funding Information: B.B.L. would like to thank the Wenner-Gren foundation for financial aid. This work was financially supported by the Swedish Research Councils for Natural Sciences (NFR) and Engineering Sciences (TFR) and by the Chinese Natural Science Foundation.",

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TY - JOUR

T1 - Synthesis and characterization of single-walled nanotubes produced with Ce/Ni as catalysts

AU - Liu, Bingbing

AU - Wågberg, T.

AU - Olsson, Eva

AU - Yang, Ruseng

AU - Li, Hongdong

AU - Zhang, Shulin

AU - Yang, Haibin

AU - Zou, Guangtian

AU - Sundqvist, B.

N1 - Funding Information: B.B.L. would like to thank the Wenner-Gren foundation for financial aid. This work was financially supported by the Swedish Research Councils for Natural Sciences (NFR) and Engineering Sciences (TFR) and by the Chinese Natural Science Foundation.

PY - 2000/4/7

Y1 - 2000/4/7

N2 - SWNTs were synthesized in high yield in the presence of Ce/Ni as catalyst. Raman and SEM results show that a fraction of the tubes are chiral and have small diameters (the snallest one is 0.79 nm), indicating that Ce plays an important role in the formation. Acid treatment is effective in eliminating impurities but changes the morphology and the electric resistance of mats with increasing treatment time. The resistance of as-grown and short time acid-treated mats follow a 2D VRH behaviour while mats treated for a long time follow a 3D model. The results indicate that hopping conduction occurs on bundles or on tubes and that there are intrinsic links between tubes in as-grown mats.

AB - SWNTs were synthesized in high yield in the presence of Ce/Ni as catalyst. Raman and SEM results show that a fraction of the tubes are chiral and have small diameters (the snallest one is 0.79 nm), indicating that Ce plays an important role in the formation. Acid treatment is effective in eliminating impurities but changes the morphology and the electric resistance of mats with increasing treatment time. The resistance of as-grown and short time acid-treated mats follow a 2D VRH behaviour while mats treated for a long time follow a 3D model. The results indicate that hopping conduction occurs on bundles or on tubes and that there are intrinsic links between tubes in as-grown mats.

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DO - 10.1016/S0009-2614(00)00235-9

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VL - 320

SP - 365

EP - 372

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 3-4

ER -

Synthesis and characterization of single-walled nanotubes produced with Ce/Ni as catalysts

Abstract

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