Separation of Double-Walled Carbon Nanotubes by Size Exclusion Column Chromatography

Katherine Moore, Moritz Pfohl, Frank Hennrich, Venkata Sai Chakradhanula, Christian Kuebel, Manfred Kappes, Joseph Shapter, Ralph Krupke, Benjamin Flavel

    Research output: Contribution to journalArticlepeer-review

    26 Citations (Scopus)


    In this report we demonstrate the separation of raw carbon nanotube material into fractions of double-walled (DWCNTs) and single-walled carbon nanotubes (SWCNTs). Our method utilizes size exclusion chromatography with Sephacryl gel S-200 and yielded two distinct fractions of single- and double-walled nanotubes with average diameters of 0.93 ± 0.03 and 1.64 ± 0.15 nm, respectively. The presented technique is easily scalable and offers an alternative to traditional density gradient ultracentrifugation methods. CNT fractions were characterized by atomic force microscopy and Raman and absorption spectroscopy as well as transmission electron microscopy.

    Original languageEnglish
    Pages (from-to)6756-6764
    Number of pages9
    JournalACS Nano
    Issue number7
    Publication statusPublished - 22 Jul 2014


    • carbon nanotube
    • double
    • purification
    • separation
    • Sephacryl gel
    • sorting


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