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Scheme of the Cu nanotube fabrication. (a) Immobilization of the sequenced HG12 peptide at the amide-binding sites of the template nanotubes. (b) The Cu ion–HG12 peptide complexation on the nanotube surfaces. (c) Cu nanocrystal growth on the nanotubes nucleated at Cu ion-binding sites after reducing trapped Cu ions with NaBH4.
