XPS spectra of alloy catalyst vs Cu sputtering power: (a) wide scan XPS spectra, (b) the ratio and the Cu percent, (c) Cu LMM XPS spectra, and (d) Cu XPS spectra.
SEM images of the CNTs grown on alloy films vs Cu sputtering power: (a) , (b) , (c) , (d) , (e) , and (f) .
Field-emission properties of the CNT cathode based on different alloy films: (a) field-emission properties of CNT films prepared at various catalysts and (b) current-density dependence on Cu sputtering power.
The compositional and process parameters of the thin films.
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