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

Haixia Xu; Apurba K. Das; Masaki Horie; Majeed S. Shaik; Andrew M. Smith; Yi Luo; Xiaofeng Lu; Richard Collins; Steven Y. Liem; Aimin Song; Paul L. A. Popelier; Michael L. Turner; Ping Xiao; Ian A. Kinloch; Rein V. Ulijn

doi:10.1039/b9nr00233b

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

Haixia Xu, Apurba K. Das, Masaki Horie, Majeed S. Shaik, Andrew M. Smith, Yi Luo, Xiaofeng Lu, Richard Collins, Steven Y. Liem, Aimin Song, Paul L. A. Popelier, Michael L. Turner, Ping Xiao, Ian A. Kinloch, Rein V. Ulijn

Research output: Contribution to journal › Article › peer-review

116 Citations (Scopus)

Abstract

We demonstrate that nanotubular networks formed by enzyme-triggered self-assembly of Fmoc-L-3 (9-fluorenylmethoxycarbonyl-tri-leucine) show significant charge transport. FT-IR, fluorescence spectroscopy and wide angle X-ray scattering (WAXS) data confirm formation of beta-sheets that are locked together via pi-stacking interactions. Molecular dynamics simulations confirmed the pi-pi stacking distance between fluorenyl groups to be 3.6-3.8 angstrom. Impedance spectroscopy demonstrated that the nanotubular xerogel networks possess minimum sheet resistances of 0.1 M Omega/sq in air and 500 M Omega/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.

Original language	English
Pages (from-to)	960-966
Number of pages	7
Journal	Nanoscale
Volume	2
Issue number	6
Early online date	6 Apr 2010
DOIs	https://doi.org/10.1039/b9nr00233b
Publication status	Published - 2010

Keywords

investigation
conductivity
peptide nanotube networks
enzyme-triggered self-assembly

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10.1039/b9nr00233b

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Xu, Haixia ; Das, Apurba K. ; Horie, Masaki ; Shaik, Majeed S. ; Smith, Andrew M. ; Luo, Yi ; Lu, Xiaofeng ; Collins, Richard ; Liem, Steven Y. ; Song, Aimin ; Popelier, Paul L. A. ; Turner, Michael L. ; Xiao, Ping ; Kinloch, Ian A. ; Ulijn, Rein V. / An investigation of the conductivity of peptide nanotube networks prepared by enzyme-triggered self-assembly. In: Nanoscale. 2010 ; Vol. 2, No. 6. pp. 960-966.

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abstract = "We demonstrate that nanotubular networks formed by enzyme-triggered self-assembly of Fmoc-L-3 (9-fluorenylmethoxycarbonyl-tri-leucine) show significant charge transport. FT-IR, fluorescence spectroscopy and wide angle X-ray scattering (WAXS) data confirm formation of beta-sheets that are locked together via pi-stacking interactions. Molecular dynamics simulations confirmed the pi-pi stacking distance between fluorenyl groups to be 3.6-3.8 angstrom. Impedance spectroscopy demonstrated that the nanotubular xerogel networks possess minimum sheet resistances of 0.1 M Omega/sq in air and 500 M Omega/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.",

keywords = "investigation, conductivity, peptide nanotube networks, enzyme-triggered self-assembly",

author = "Haixia Xu and Das, {Apurba K.} and Masaki Horie and Shaik, {Majeed S.} and Smith, {Andrew M.} and Yi Luo and Xiaofeng Lu and Richard Collins and Liem, {Steven Y.} and Aimin Song and Popelier, {Paul L. A.} and Turner, {Michael L.} and Ping Xiao and Kinloch, {Ian A.} and Ulijn, {Rein V.}",

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An investigation of the conductivity of peptide nanotube networks prepared by enzyme-triggered self-assembly. / Xu, Haixia; Das, Apurba K.; Horie, Masaki; Shaik, Majeed S.; Smith, Andrew M.; Luo, Yi; Lu, Xiaofeng; Collins, Richard; Liem, Steven Y.; Song, Aimin; Popelier, Paul L. A.; Turner, Michael L.; Xiao, Ping; Kinloch, Ian A.; Ulijn, Rein V.

In: Nanoscale, Vol. 2, No. 6, 2010, p. 960-966.

Research output: Contribution to journal › Article › peer-review

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AU - Smith, Andrew M.

AU - Luo, Yi

AU - Lu, Xiaofeng

AU - Collins, Richard

AU - Liem, Steven Y.

AU - Song, Aimin

AU - Popelier, Paul L. A.

AU - Turner, Michael L.

AU - Xiao, Ping

AU - Kinloch, Ian A.

AU - Ulijn, Rein V.

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AB - We demonstrate that nanotubular networks formed by enzyme-triggered self-assembly of Fmoc-L-3 (9-fluorenylmethoxycarbonyl-tri-leucine) show significant charge transport. FT-IR, fluorescence spectroscopy and wide angle X-ray scattering (WAXS) data confirm formation of beta-sheets that are locked together via pi-stacking interactions. Molecular dynamics simulations confirmed the pi-pi stacking distance between fluorenyl groups to be 3.6-3.8 angstrom. Impedance spectroscopy demonstrated that the nanotubular xerogel networks possess minimum sheet resistances of 0.1 M Omega/sq in air and 500 M Omega/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.

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