Figure 5
From: High-speed roll-to-roll manufacturing of graphene using a concentric tube CVD reactor
Benefit of continuous thermal processing with direct transition from a reducing to carbon-containing atmosphere. a) Raman spectra of Cu foil strips that were translated from upstream of the furnace to the annealing zone (black), from the annealing zone to the growth zone (red) and from the growth zone to the exit (downstream) of the furnace (blue). The sample sequentially exposed to the annealing and growth zones shows the best result and growth does not occur in the annealing zone only. b) Comparison of Raman spectra for CTCVD processing with both zones to processing with the growth zone only.
