A solvothermal-reduction method for the production of horn shaped multi-wall carbon nanotubes Original Research Article

Horn shaped multi-wall carbon nanotubes (HMWCNTs) with uniform diameter of ∼100 nm, an average wall thickness of 10 nm and length of about 1 μm were prepared using a solvothermal-reduction method employing carbon tetrachloride as a carbon source and metal