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(a) TEM and SEM images of prepared nickel filled nanofiber before PLD deposition. (b) TEM and SEM images of the CNTs grown on the prepared nanofibers after PLD deposition. (c) Illustration of the growth mechanism of the CNTs.
SEM images of CNTs grown on nanofibers for 5 min at substrate temperatures of (a) , (c) , and (e) , respectively. (b), (d) and (f) are the corresponding high magnified SEM images. [(g) and (h)] The elemental mapping of the carbon and nickel content from the sample at .
(a) XRD of the samples corresponding to the samples shown in Fig. 1 . (b) Typical Raman spectra of the obtained samples.
The current v. electric field ( curves) characteristics of the CNT emitters.
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