Helical Wrapping of Single-Walled Carbon Nanotubes by Water Soluble Poly(p-phenyleneethynylene)
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- 作者：Youn K. Kang ; One-Sun Lee ; Pravas Deria ; Sang Hoon Kim ; Tae-Hong Park ; Dawn A. Bonnell ; Jeffery G. Saven ; Michael J. Therien
- 刊名：Nano Letters
- 出版年：2009
- 出版时间：April 8, 2009
- 年：2009
- 卷：9
- 期：4
- 页码：1414-1418
- 全文大小：284K
- 年卷期：v.9,no.4(April 8, 2009)
- ISSN：1530-6992
文摘
Amphiphilic, linear conjugated poly[p-{2,5-bis(3-propoxysulfonicacidsodiumsalt)}phenylene]ethynylene (PPES) efficiently disperses single-walled carbon nanotubes (SWNTs) under ultrasonication conditions into the aqueous phase. Vis-NIR absorption spectroscopy, atomic force microscopy (AFM), and transmission electron microscopy (TEM) demonstrate that these solubilized SWNTs are highly individualized. AFM and TEM data reveal that the interaction of PPES with SWNTs gives rise to a self-assembled superstructure in which a polymer monolayer helically wraps the nanotube surface; the observed PPES pitch length (13 ± 2 nm) confirms structural predictions made via molecular dynamics simulations. This work underscores design elements important for engineering well-defined nanotube-semiconducting polymer hybrid structures.