Rapid growth of carbon nanotubes using laser-induced chemical vapor deposition Available to Purchase

This paper presents the growth of multi-walled (MW) and single-walled (SW) carbon nanotubes (CNTs) by laser-induced chemical vapor deposition (LCVD) on a transparent substrate at room temperature. For the CNT growth, multiple catalyst layers (Fe/Al/Cr) are irradiated from the backside through the transparent substrate with a Nd:YVO₄ laser (λ=532 nm). It is demonstrated that the fabrication of array of CNT patterns can be achieved with a single irradiation for each pattern using LCVD. By controlling the catalyst thickness and precursor gases (acetylene: C₂H₂ or ethylene: C₂H₄), SWCNTs and MWCNTs patterns are produced without preprocessing. The rapid growth of vertically aligned MWCNTs with a high rate of 1 µm/s is achieved. The SWCNT patterns with relatively high density are produced.