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Issue 6, 2010
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An investigation of the conductivity of peptide nanotube networks prepared by enzyme-triggered self-assembly

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Abstract

We demonstrate that nanotubular networks formed by enzyme-triggered self-assembly of Fmoc-L3 (9-fluorenylmethoxycarbonyl-tri-leucine) show significant charge transport. FT-IR, fluorescence spectroscopy and wide angle X-ray scattering (WAXS) data confirm formation of β-sheets that are locked together via π-stacking interactions. Molecular dynamics simulations confirmed the π–π stacking distance between fluorenyl groups to be 3.6–3.8 Å. Impedance spectroscopy demonstrated that the nanotubular xerogel networks possess minimum sheet resistances of 0.1 MΩ/sq in air and 500 MΩ/sq in vacuum (pressure: 1.03 mbar) at room temperature, with the conductivity scaling linearly with the mass of peptide in the network. These materials may provide a platform to interface biological components with electronics.

Graphical abstract: An investigation of the conductivity of peptide nanotube networks prepared by enzyme-triggered self-assembly

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Publication details

The article was received on 23 Aug 2009, accepted on 16 Feb 2010 and first published on 06 Apr 2010


Article type: Paper
DOI: 10.1039/B9NR00233B
Citation: Nanoscale, 2010,2, 960-966
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    An investigation of the conductivity of peptide nanotube networks prepared by enzyme-triggered self-assembly

    H. Xu, A. K. Das, M. Horie, M. S. Shaik, A. M. Smith, Y. Luo, X. Lu, R. Collins, S. Y. Liem, A. Song, P. L. A. Popelier, M. L. Turner, P. Xiao, I. A. Kinloch and R. V. Ulijn, Nanoscale, 2010, 2, 960
    DOI: 10.1039/B9NR00233B

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