Sorting of Double-Walled Carbon Nanotubes According to Their Outer Wall Electronic Type via a Gel Permeation Method

Katherine Moore, Moritz Pfohl, Daniel Tune, Frank Hennrich, Simone Dehm, Venkata Sai Chakradhanula, Christian Kubel, Ralph Krupke, Benjamin Flavel

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    15 Citations (Scopus)

    Abstract

    In this work, we demonstrate the application of the gel permeation technique to the sorting of double-walled carbon nanotubes (DWCNTs) according to their outer wall electronic type. Our method uses Sephacryl S-200 gel and yields sorted fractions of DWCNTs with impurities removed and highly enriched in nanotubes with either metallic (M) or semiconducting (S) outer walls. The prepared fractions are fully characterized using optical absorption spectroscopy, transmission electron microscopy, and atomic force microscopy, and the entire procedure is monitored in real time using process Raman analysis. The sorted DWCNTs are then integrated into single nanotube field effect transistors, allowing detailed electronic measurement of the transconductance properties of the four unique inner@outer wall combinations of S@S, S@M, M@S, and M@M.

    Original languageEnglish
    Pages (from-to)3849-3857
    Number of pages9
    JournalACS Nano
    Volume9
    Issue number4
    DOIs
    Publication statusPublished - 2015

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  • Cite this

    Moore, K., Pfohl, M., Tune, D., Hennrich, F., Dehm, S., Chakradhanula, V. S., Kubel, C., Krupke, R., & Flavel, B. (2015). Sorting of Double-Walled Carbon Nanotubes According to Their Outer Wall Electronic Type via a Gel Permeation Method. ACS Nano, 9(4), 3849-3857. https://doi.org/10.1021/nn506869h