CVD-Graphene The Aixtron Black Magic CVD furnace is dedicated to graphene synthesis and can accommodate multiple pieces or a single 4" wafer, with methane and hydrogen available as process gases. Process recipes have been optimized and are available to the user for the following: Cu foil (available from SNF stockroom or provided by the user), Cu-coated substrates, and Ni substrates. The recipes on Cu have been characterized to give excellent monolayer coverage with minimal areas of bilayers and low defectivity. Ni substrates will give multi-monolayer growth.