SEM images of (a) vertically aligned forest with disoriented layer, (b) top view, and (c) top of a clean forest.
XPS spectra of . (a) Top surface of a CNT forest with disoriented layer. (b) Substrate surface after removal of CNT forest.
AFM images of substrate showing the changes in the morphology of the iron catalyst. (a) After Fe coating ( in direction). (b) After preheating . (c) After CNT growth and removal (a few nanotubes remained on the surface, ).
XPS spectra showing changes in the chemical state of the iron catalyst (a) when it was deposited (b), after preheating (B), and (c) after CNT growth and removal.
Article metrics loading...
Full text loading...