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Li YS, Liao JL, Wang SY, et al. Intercalation-assisted longitudinal unzipping of carbon nanotubes for green and scalable synthesis of graphene nanoribbons. Sci Rep. 2016;6:22755doi: 10.1038/srep22755.
Li, Y. S., Liao, J. L., Wang, S. Y., & Chiang, W. H. (2016). Intercalation-assisted longitudinal unzipping of carbon nanotubes for green and scalable synthesis of graphene nanoribbons. Scientific reports, 622755. https://doi.org/10.1038/srep22755
Li, Yan-Sheng, et al. "Intercalation-assisted longitudinal unzipping of carbon nanotubes for green and scalable synthesis of graphene nanoribbons." Scientific reports vol. 6 (2016): 22755. doi: https://doi.org/10.1038/srep22755
Li YS, Liao JL, Wang SY, Chiang WH. Intercalation-assisted longitudinal unzipping of carbon nanotubes for green and scalable synthesis of graphene nanoribbons. Sci Rep. 2016 Mar 07;6:22755. doi: 10.1038/srep22755. PMID: 26948486; PMCID: PMC4780102.
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Sci Rep. 2016 Mar 07;6:22755. doi: 10.1038/srep22755.

Intercalation-assisted longitudinal unzipping of carbon nanotubes for green and scalable synthesis of graphene nanoribbons.

Scientific reports

Yan-Sheng Li, Jia-Liang Liao, Shan-Yu Wang, Wei-Hung Chiang

Affiliations

  1. Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan.

PMID: 26948486 PMCID: PMC4780102 DOI: 10.1038/srep22755

Abstract

We have demonstrated an effective intercalation of multi-walled carbon nanotubes (MWCNTs) for the green and scalable synthesis of graphene nanoribbons (GNRs) using an intercalation-assisted longitudinal unzipping of MWCNTs. The key step is to introduce an intercalation treatment of raw MWCNTs with KNO3 and H2SO4, making it promising to decrease the strong van der Waals attractions in the MWCNTs bundles and between the coaxial graphene walls of CNTs. Systematic micro Raman, X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) characterizations suggest that potassium, nitrate, and sulfate ions play an important role in the CNT intertube and intratube intercalations during the pretreatment. Detailed scanning electron microscopy (SEM), transmission electron microscopy, XRD, and micro Raman characterizations indicate that the developed methodology possesses the ability to synthesis GNRs effectively with an improved CNT concentration in H2SO4 of 10 mg/ml at 70 °C, which is amenable to industrial-scale production because of the decreased amount of strong acid. Our work provides a scientific understanding how to enhance the GNR formation by accelerating the CNT longitudinal unzipping via suitable molecular intercalation.

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