Figure 2

The stainless steel meshes and the cobalt nanoparticles coated onto the meshes (SEM, inset); (b) The stainless steel meshes after CNTs growth and the Raschig rings (inset); (c) SEM image of stainless steel mesh coated with pristine CNTs and the inset shows the morphology of the CNTs array; (d) Enlarged SEM image of the CNTs array and the inset shows TEM images of CNTs taken from the stainless steel mesh and catalytic particles used for CNTs growth is evident. The cobalt nanoparticles synthesized in advance was coated to the wire mesh before the CNTs' growth and the ferrocene containing benzene was used as carbon source for the CNTs' growth.