Complex sentence: The aforementioned single layer growth is also due to the low concentration of carbon in methane and larger hydrocarbon gasses, such as ethane and propane, will lead to the growth of bilayer graphene.
Split into simpler sentences: The aforementioned single layer growth is also due to the low concentration of carbon in methane. Larger hydrocarbon gasses, such as ethane and propane, will lead to the growth of bilayer graphene.