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Issue 45, 2018
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Templated direct growth of ultra-thin double-walled carbon nanotubes

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Double-walled carbon nanotubes (DWCNTs) combined the advantages of multi-walled (MW-) and single-walled (SW-) CNTs can be obtained by transforming the precursors (e.g. fullerene, ferrocene) into thin inner CNTs inside SWCNTs as templates. However, this method is limited since the DWCNT yield is strongly influenced by the filling efficiency (depending on the type of the filled molecules), opening and cutting the SWCNTs, and the diameter of the host SWCNTs. Therefore, it cannot be applied to all types of SWCNT templates. Here we show a universal route to synthesize ultra-thin DWCNTs via making SWCNTs stable at high temperature in vacuum. This method applies to different types of SWCNTs including metallicity-sorted ones without using any precursors since the carbon sources were from the reconstructed SWCNTs and the residue carbons. The resulting DWCNTs are with high quality and the yield of inner tubes is comparable to/higher than that of the DWCNTs made from the transformation of ferrocene/fullerene peapods.

Graphical abstract: Templated direct growth of ultra-thin double-walled carbon nanotubes

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Publication details

The article was received on 27 Aug 2018, accepted on 04 Nov 2018 and first published on 05 Nov 2018

Article type: Paper
DOI: 10.1039/C8NR06925E
Citation: Nanoscale, 2018,10, 21254-21261

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    Templated direct growth of ultra-thin double-walled carbon nanotubes

    L. Shi, J. Wei, K. Yanagi, T. Saito, K. Cao, U. Kaiser, P. Ayala and T. Pichler, Nanoscale, 2018, 10, 21254
    DOI: 10.1039/C8NR06925E

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