Researchers from Israel's Bar Ilan University discovered that preheating the gas precursors in atmospheric-pressure CVD graphene production results in 100% reproducibility, and higher quality graphene sheets.
The researchers say that the graphene produced in the new method required a lower processing temperature and exhibited 50% less defects compared to graphene made without gas preheating. In addition, all experiments (100% reproducibility) performed with gas heating led to "acceptable quality" graphene - compared to only 15% of the experiments performed without gas preheating.
These results suggest that CVD production yields can be improved by using gas preheating. The experiments used a nickel substrate, atmospheric pressure CVD and ethylene and hydrogen precursors gases.
You can order the full research paper here.
