2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Architecture control of vertically aligned single-walled carbon nanotubes in arrays of optically templated lines: properties and applications

C.L. Pint, Y.-Q. Xu, N. Nicholas, M. Pasquali, R.H. Hauge
Rice University, US

Keywords:
carbon nanotubes, chemical vapor deposition, optical lithography

Abstract:
We present the growth of vertically aligned single-walled carbon nanotubes in ordered arrays of lines that are patterned through optical lithography. We demonstrate that the gas flow dynamics directly influence the architecture of the lines, and that we can control the curvature of the line (straight or curved) by directing the gas flow direction relative to the direction of the line in which the catalyst and support are deposited. Based on these experiments, we present a model for this growth due to gas diffusion through an array of lines in a low Knudsen number regime. In addition, we investigate the wetting and electrical properties of this material in comparison to that of the full vertically aligned nanotube array, and explore using this growth geometry for rolling the freestanding lines over to form ultra-thin, aligned films which can be detached from the substrate and utilized for partially transparent conducting thin films.


Nanotech 2008 Conference Program Abstract