Preparation And Characterization Of Graphene On Different Alloy Substrates

Graphene, owning to its intriguing structures and properties in physics, has attracted great attention in scientific community and engineering industry. Nowadays, researches and applications related to graphene are developing at fall speed.In this paper it summarizes the characteristics to the chemical vapor deposition (CVD) graphene growth on the catalytic metal substrate, on the basis of the method of CVD it respectively gets the monolayer and multilayer graphene on Cu substrate and Cu-Ni double composite substrate. At the same time, it also explore the possibility of graphene growth on the Fe-Pt alloy substrate by CVD method, and solid carbon source method to grow the graphene. the Raman spectra, scanning electron microscopy (SEM)-, transmission electron microscopy (TEM) and other advanced technology are used to analyzes the influence by factors of ratio of Cu-Ni、sedimentation time, temperature, pressure, etc, on the morphology, structure of graphene. It can get single layer graphene when Cu content is greater than the Ni content; as the extension of deposition time, the graphene gradually changed from single to double when the contents of Cu and Ni ratio are the same. When Cu content is less than the Ni content, the graphene are always formed to multilayer; At the condition of appropriate pressure and the fixed Cu film thickness, it will get relatively large area high quality graphene at the bottom of the Cu substrate, which avoid the graphene structure damage in the process of using the method of wet chemical graphene transfer. These results control the CVD graphene layers and defects by regulation the alloy substrate. At the same time, it has an important guiding to improve the quality of CVD graphene.In the end, through change the growth parameter, we can control the graphene layers on copper-nickel alloy and grow large area and single layer graphene directly on single layer metal catalyst substrate, which avoiding the damage of graphene during transferring. At the same time, it can be realized that the two material make combination with each other by growth graphene on Fe-Pt alloy directly.