Skoltech researchers have investigated the procedure for catalyst delivery used in the most common method of carbon nanotube production, chemical vapor deposition (CVD), offering what they call a "simple and elegant" way to boost productivity and pave the way for cheaper and more accessible nanotube-based technology. The paper was published in the Chemical Engineering Journal.
source https://phys.org/news/2020-11-scientists-boost-production-carbon-nanotubes.html