= Solution
Use <floating-catalyst chemical vapor deposition> to form a continuous suspended network. Introduce a carbon feed together with a volatile catalyst precursor into a hot gas-flow reactor. Catalyst <nanoparticles> nucleate in the gas stream; tubes grow while moving through the reaction zone and assemble into an interconnected aerogel.
Withdraw that network continuously, collect it on a rotating spindle, and consolidate or twist it into a fiber. Long tubes, suitable number density and adequate overlap allow the network to transmit the drawing <force> without breaking into isolated clumps. The take-up rate must be matched to network production; collection is not simply a geometrically scaled version of a substrate carpet.
\b[The catalyst and tubes form in the flowing gas, and the product is drawn directly from a growing aerogel.] This differs both from a supported carpet and from later spinning of a separately prepared nanotube dispersion. The original demonstration combined CVD synthesis with continuous product withdrawal from the furnace.<Direct Spinning of Carbon Nanotube Fibers from Chemical Vapor Deposition Synthesis by Ya-Li Li and others>[Science304, pp.276–278, synthesis-zone spinning and rotating collection]{ref}
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