The effect of a new bimetallic catalyst Ho/Ni for synthesis of single-walled carbon nanotubes (SWNTs) by arc discharge has been studied. Long ribbons consisting roughly-aligned SWNT bundles were obtained by a modified arc discharge apparatus. Ribbon lengths can reach as much as 20 cm. Both elements Ho and Ni play important roles in the synthesis of SWNTs with high yield and purity. Changes in the Ho and Ni concentration in the catalyst hardly affect the diameter distribution of SWNTs, but the yield and purity of SWNTs are very sensitive to the concentration. An optimal range of Ho/Ni compositions for synthesis of SWNTs with relatively high purity and yield is given. (C) 2005 Elsevier Ltd. All rights reserved.
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Univ Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USAUniv Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Dervishi, Enkeleda
Li, Zhongrui
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Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USAUniv Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Li, Zhongrui
Watanabe, Fumiya
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Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USAUniv Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Watanabe, Fumiya
Xu, Yang
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Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USAUniv Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Xu, Yang
Saini, Viney
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Univ Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USAUniv Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Saini, Viney
Biris, Alexandru R.
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Natl Inst Res & Dev Isotop & Mol Technol, R-400293 Cluj Napoca, RomaniaUniv Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Biris, Alexandru R.
Biris, Alexandru S.
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Univ Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA
Univ Arkansas, Nanotechnol Ctr, Little Rock, AR 72204 USAUniv Arkansas, Dept Appl Sci, Little Rock, AR 72204 USA