Excimer laser nanostructuring of nickel thin films for the catalytic growth of carbon nanotubes
Henley, S. J., Poa, C. H. P., Adikaari, A. A. D. T., Giusca, C. E., Carey, JD and Silva, S. R. P. (2004) Excimer laser nanostructuring of nickel thin films for the catalytic growth of carbon nanotubes Applied Physics Letters, 84. pp. 4035-4037.
Pulse laser ablation and subsequent laser nanostructuring at room temperature has been employed to produce nanostructured Ni on SiO2/Si substrates for catalytic growth of carbon nanotubes. The resultant nanostructured surface is seen to consist of nanometer sized hemispherical droplets whose mean diameter is controlled by the initial metal thickness, which in turn is readily controlled by the number of laser pulses. Vertically aligned multiwall carbon nanotube mats were then grown using conventional plasma enhanced chemical vapor deposition. We show that within a single processing technique it is possible to produce the initial metal-on-oxide thin film to a chosen thickness but also to be able to alter the morphology of the film to desired specifications at low macroscopic temperatures using the laser parameters. The influence of the underlying oxide is also explored to explain the mechanism of nanostructuring of the Ni catalyst.
|Divisions :||Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre|
|Date :||23 March 2004|
|Additional Information :||This is a pre-copy-editing, author-prepared, peer-reviewed PDF of an article accepted for publication in Applied Physics Letters. The article appeared in Applied Physics Letters, 84, 4035-4037. Click here to access the publisher's version. © 2004 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.|
|Depositing User :||Mr Adam Field|
|Date Deposited :||27 May 2010 14:38|
|Last Modified :||23 Sep 2013 18:31|
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