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. 2016 Aug 17;6:30945. doi: 10.1038/srep30945

Figure 1. Preparation of the polydopamine-treated Cu current collector.

Figure 1

(a) OM images of the bare Cu (left) and the polydopamine-treated Cu (right). (b) XPS spectra of the bare Cu (top) and polydopamine-treated Cu (bottom). (c) Contact angle images of the bare Cu (left) and the polydopamine-treated Cu (right).