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Issue 28, 2017
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Self-bonding and the electrochemical properties of silica-coated nanowires composed of cobalt-coordinated peptide bundles

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Abstract

We propose a method for self-bonding between electrodes using the self-organizational processes of a silica-coated peptide hybrid nanowire. We designed and synthesized a 23-mer α-helical peptide having functional sites that serve as catalytic sites for silica mineralization (glutamic acid [Glu] and lysine [Lys]) and binding (serine [Ser]), as well as for the formation of a Co(II) ion complex. The peptides formed nanowires composed of α-helical bundles that showed axial connection because of complexation between Co(II) and the histidine (His) residues, and macro-dipole interactions of the α-helical peptides. The nanowires self-bonded between the electrodes, and the surface of the nanowires was coated with silica using mineralization. The silica coating of the surface of the Co(II)-coordinated peptide nanowires induced two kinds of phenomena: (1) structural stabilization of the peptide nanowire component in the composite and (2) an increase in conductivity compared with that of the non-coated peptide nanowires.

Graphical abstract: Self-bonding and the electrochemical properties of silica-coated nanowires composed of cobalt-coordinated peptide bundles

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Publication details

The article was received on 24 Apr 2017, accepted on 20 Jun 2017 and first published on 21 Jun 2017


Article type: Paper
DOI: 10.1039/C7TB01118K
Citation: J. Mater. Chem. B, 2017,5, 5539-5548
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    Self-bonding and the electrochemical properties of silica-coated nanowires composed of cobalt-coordinated peptide bundles

    K. Murai, Y. Yamamoto, T. Kinoshita, K. Nagata and M. Higuchi, J. Mater. Chem. B, 2017, 5, 5539
    DOI: 10.1039/C7TB01118K

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