Abstract
A scalable roll‐to‐roll process is employed to produce graphitic petals. A 1‐meter sample of graphitic petals on carbon fiber tow is produced with a roll‐to‐roll radio‐frequency plasma chemical vapor deposition method. Microscale characterization reveals increasingly graphitic carbon structures with production time. Correspondingly, macroscale characterization shows enhanced functional performance with production time: decreasing electrical resistance and increasing capacitance. Using optical emission spectroscopy, important species in the plasma are studied and used to determine the plasma gas temperature. The results demonstrate that 1) successful cost‐driven production of graphitic petals is possible, 2) a plasma diagnostic technique is capable of real‐time process monitoring, and 3) meaningful material characterization methods are amenable to a production setting. Finally, valuable experiential learnings are shared to inform future equipment design and process development.
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