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Title: Micro-topiary - laser pruning of carbon nanotubes arrays fabrication of static and movable CNTs structures via laser trimming
Authors: Sow, C.-H. 
Lim, K.-Y.
Cheong, F.-C.
Saurakhiya, N.
Issue Date: Apr-2011
Citation: Sow, C.-H.,Lim, K.-Y.,Cheong, F.-C.,Saurakhiya, N. (2011-04). Micro-topiary - laser pruning of carbon nanotubes arrays fabrication of static and movable CNTs structures via laser trimming. Nanocomposites, Nanoparticles and Nanotubes : 1-30. ScholarBank@NUS Repository.
Abstract: We report our efforts in developing laser beams as simple means to fabricate patterned arrays of aligned CNTs or three-dimensional structures made of CNTs without a pre-patterned substrate. Two related techniques were developed. The first technique makes use of a tightly focused laser beam from a moderate power He-Ne laser as precision trimming tool to create unique 3D CNTs structures. The details of the technique will be presented. The technique can be used to modify the surface morphology of the CNTs forest. The technique also allows for a wider range of three-dimensional CNTs microstructures to be constructed. In addition, some of the structures created were found to exhibit laser-beam induced mechanical motion. Such behavior can be exploited in creating possible micro-optomechanical devices made of CNTs. We demonstrated the feasibility of a simple optomechanical switch with this method. The second technique makes use of a parallel or converging laser beam from a high power UV pulsed laser for the destruction of aligned CNTs with a copper grid as lithography mask to define patterned aligned CNTs arrays. This technique is simple to implement, inherently parallel and has high throughput. It is well suited for creating a large extended area of patterned CNTs array. © 2011 by Nova Science Publishers, Inc. All rights reserved.
Source Title: Nanocomposites, Nanoparticles and Nanotubes
ISBN: 9781611229813
Appears in Collections:Staff Publications

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