Enhancement of electron field emission of vertically aligned carbon nanotubes by nitrogen plasma treatment
Wang, B.B., Cheng, Q.J., Chen, X., & Ostrikov, K. (2011) Enhancement of electron field emission of vertically aligned carbon nanotubes by nitrogen plasma treatment. Journal of Alloys and Compounds, 509(38), pp. 9329-9334.
The electron field emission (EFE) characteristics from vertically aligned carbon nanotubes (VACNTs) without and with treatment by the nitrogen plasma are investigated. The VACNTs with the plasma treatment showed a significant improvement in the EFE property compared to the untreated VACNTs. The morphological, structural, and compositional properties of the VACNTs are extensively examined by scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and energy dispersive X-ray spectroscopy. It is shown that the significant EFE improvement of the VACNTs after the nitrogen plasma treatment is closely related to the variation of the morphological and structural properties of the VACNTs. The high current density (299.6 μA/cm2) achieved at a low applied field (3.50 V/μm) suggests that the VACNTs after nitrogen plasma treatment can serve as effective electron field emission sources for numerous applications.
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|Item Type:||Journal Article|
|Keywords:||Plasma nanoscience; Plasma made nanostructures; Carbon nanotubes|
|Divisions:||Current > QUT Faculties and Divisions > Science & Engineering Faculty|
|Deposited On:||10 Jul 2014 01:11|
|Last Modified:||11 Jul 2014 00:25|
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