HIGHLIGHTS
SUMMARY
The similar atomic size and crystal_structure (face-centered cubic) of Cu and Ni metals (neighboring elements in the periodic table) favor the complete solid solubility in the alloy and thus a means of controlling the solubility of carbon in the solid solution at higher temperatures (~1000 ◦ C). By using a Cux Ni1-x alloy of appropriate composition one can regulate the graphene layer numbers during CVD graphene growth. By employing Raman spectroscopy, the authors showed that the gradient catalyst is indeed effective at growing a gradient in graphene thickness during a single CVD growth . . .
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