Abstract
Single-walled carbon nanotubes (SWNTs) were directly grown onto poly-crystalline silicon grids by catalytic thermal chemical vapour deposition. We demonstrate that simple micromachining of the catalyst-covered support can influence the number, location and alignment of suspended SWNTs. Sharp apexes formed by over-etching circular microstructures enable the scalable, cost-efficient formation of mostly individual, straight SWNT bridges, as verified by Raman scattering and electron diffraction.
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