By simply heating commercial copper foil under an oxygen atmosphere and subsequently annealing CuO under a hydrogen atmosphere, the 3D Cu structures in the form of double hierarchical bumps are generated. The contact angle of a lotus leaf-inspired graphene grown on the reconstructed 3D Cu structures is 154.2°.
J. Yoon, C. Yoon, J. Lee and J. Jang, Chem. Commun., 2013, 49, 10626 DOI: 10.1039/C3CC46156D
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