Yangqiao Liu et al 2007 Nanotechnology 18 365702 doi:10.1088/0957-4484/18/36/365702
Debundling of single-walled carbon nanotubes by using natural polyelectrolytes
Yangqiao Liu1, Lian Gao1,3, Shan Zheng1, Yan Wang1, Jing Sun1, Hisashi Kajiura2, Yongming Li2 and Kazuhiro Noda2
Show affiliationsNatural polyelectrolytes (NPs), including sodium lignosulfonate, humic acid and so forth, are reported for the first time to solubilize single-walled carbon nanotubes (SWNTs) in water through a noncovalent interaction. A variety of methods, including transmission electron microscopy (TEM), visible–near-infrared (vis–NIR) spectra, Raman spectra and zeta potential measurements, were used to characterize the NP-dispersed SWNT solutions. It is found that the SWNTs can be exfoliated into thin bundles or individual tubes, even at NP concentrations as low as 0.15 mg ml−1. Their high performance is attributed to the abundance of aromatic groups and ionized groups in the NP molecules. This method of solubilization opens the way for exploiting new natural materials as SWNT solubilizers and may find applications in nanocomposites, self-assembly, and so forth.
- PACS
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78.30.Na Fullerenes and related materials
78.40.Ri Fullerenes and related materials
- Subjects
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Soft matter, liquids and polymers
Condensed matter: electrical, magnetic and optical
Surfaces, interfaces and thin films
- Dates
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Issue 36 (12 September 2007)
Received 5 May 2007, in final form 2 July 2007
Published 10 August 2007
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Debundling of single-walled carbon nanotubes by using natural polyelectrolytes
Yangqiao Liu et al 2007 Nanotechnology 18 365702
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