Nano Archive

Pulsed laser dewetting of nickel catalyst for carbon nanofiber growth

Guan, Y. F. and Pearce, R. C. and Melechko, A. V. and Hensley, D. K. and Simpson, M. L. and Rack, P. D. (2008) Pulsed laser dewetting of nickel catalyst for carbon nanofiber growth. NANOTECHNOLOGY, 19 (23).

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We present a pulsed laser dewetting technique that produces single nickel catalyst particles from lithographically patterned disks for subsequent carbon nanofiber growth through plasma enhanced chemical vapor deposition. Unlike the case for standard heat treated Ni catalyst disks, for which multiple nickel particles and consequently multiple carbon nanofibers (CNFs) are observed, single vertically aligned CNFs could be obtained from the laser dewetted catalyst. Different laser dewetting parameters were tested in this study, such as the laser energy density and the laser processing time measured by the total number of laser pulses. Various nickel disk radii and thicknesses were attempted and the resultant number of carbon nanofibers was found to be a function of the initial disk dimension and the number of laser pulses.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
ID Code:6078
Deposited By:IoN
Deposited On:11 Sep 2009 17:07
Last Modified:11 Sep 2009 17:07

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