Straightening Single-Walled Carbon Nanotubes by Adsorbed Rigid Poly(3-hexylthiophene) Chains via π–π Interaction

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• 作者：Jun-Huan Li ; Ping Li ; Jun-Ting Xu ; Christine K. Luscombe ; Zhi-Qiang Fan
• 刊名：Journal of Physical Chemistry C
• 出版年：2016
• 出版时间：December 8, 2016
• 年：2016
• 卷：120
• 期：48
• 页码：27665-27674
• 全文大小：687K
• ISSN：1932-7455

文摘

The straightened morphology of single-walled carbon nanotubes (SWCNTs) driven by rigid and conjugated regioregular poly(3-hexylthiophene) (rr-P3HT) and the related mechanism were studied with transmission electron microscopy (TEM), atomic force microscopy (AFM), and spectroscopic methods. It was found that bent SWCNTs could be straightened significantly in solutions with low SWCNT concentration, which was quantitatively confirmed by the increased persistence length. UV–vis and photoluminescence spectroscopic studies revealed that there exists strong π–π interaction between P3HT chains and SWCNTs. The P3HT chains also became more rigid after interaction with SWCNTs. We proposed that SWCNTs were straightened by the coaxially adsorbed P3HT chains instead of epitaxial P3HT crystals. Multiwalled carbon nanotubes (MWCNTs) could not be straightened by P3HT under the same conditions, showing that the straightening force was limited. This result may be useful in preparation of aligned arrays of SWCNTs/conjugated polymer supramolecular structures.