Direct Deposition of Bamboo-Like Carbon Nanotubes on Copper Substrates by Sulfur-Assisted HFCVD

Figure 4

(a) and (b) Field emission plots of two samples of BCNTs showing the behavior of the current density as a function of electric field, (c) and (d) the corresponding Fowler-Nordheim plots revealing two distinct slopes.

(a)

(b)

(c)

(d)