Wet-chemical catalyst deposition for scalable synthesis of vertical aligned carbon nanotubes on metal substrates

► Wet-chemical deposition of metal catalyst alloys for CNT growth was developed. ► Homogeneous vertical aligned CNT films of 170 μm height were achieved. ► The catalyst composition influences both growth rate and structure of VA-CNT films. ► Alloying of Co in Fe catalysts leads to increased growth rates. ► Small doping of Mo to the Fe catalyst leads to increased density of the CNT films.