Abstract
The requirements of simple and reliable protocols for the synthesis of nanostructures with controlled morphology continue to be a major challenge in nanoscale. We demonstrate a novel and simplified synthesis technique for double wall carbon nanotubes using flotation chemical vapour deposition by adding a small amount of sulfur into the catalyst. Double wall nanotubes (DWNTs) provide ideal geometries for numerous fundamental structural, electronic, thermal, and vibrational studies. The diameter distribution of DWNTs is 25 ± 10 nm except one which is ∼148.6 nm.
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