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Growth and field emission properties of vertically aligned carbon nanofibers

Poa, CHP, Henley, SJ, Chen, GY, Adikaari, AADT, Giusca, CE and Silva, SRP (2005) Growth and field emission properties of vertically aligned carbon nanofibers JOURNAL OF APPLIED PHYSICS, 97 (11). ? - ?. ISSN 0021-8979


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Vertically aligned carbon nanofibers (VACNFs) were synthesized on Ni-coated Si substrates using a dc plasma-enhanced chemical-vapor deposition system. The size of the Ni islands used as catalyst to grow the VACNFs was formed by both thermal annealing and laser processing on thin metal layers. It was observed that the diameter of the carbon nanofibers is strongly dependent on the initial Ni island dimension. By varying the laser power from 228 to 279 mJ/cm(2), the size of these Ni islands can be controlled independent of the initial Ni film thickness. Electron field-emission results show that the emission threshold field is dependent on both the height and radius of these VACNFs and also field shielding effects. Threshold fields as low as 2 V/mu m was obtained from the sample with the largest height over radius ratio.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Applied, Physics, CHEMICAL-VAPOR-DEPOSITION, NANOTUBES, TEMPERATURE, IRON
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:05
Last Modified: 23 Sep 2013 18:25

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