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 journalArticle

109 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.

LanguageEnglish
Pages960-966
Number of pages7
JournalNanoscale
Volume2
Issue number6
Early online date6 Apr 2010
DOIs
Publication statusPublished - 2010

Fingerprint

Peptide Nanotubes
Xerogels
Sheet resistance
Fluorescence spectroscopy
X ray scattering
Leucine
Self assembly
Nanotubes
Peptides
Molecular dynamics
Charge transfer
Electronic equipment
Enzymes
Spectroscopy
Vacuum
Computer simulation
Air
Temperature
9-fluorenylmethoxycarbonyl

Keywords

  • investigation
  • conductivity
  • peptide nanotube networks
  • enzyme-triggered self-assembly

Cite this

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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Xu, H, Das, AK, Horie, M, Shaik, MS, Smith, AM, Luo, Y, Lu, X, Collins, R, Liem, SY, Song, A, Popelier, PLA, Turner, ML, Xiao, P, Kinloch, IA & Ulijn, RV 2010, 'An investigation of the conductivity of peptide nanotube networks prepared by enzyme-triggered self-assembly' Nanoscale, vol. 2, no. 6, pp. 960-966. https://doi.org/10.1039/b9nr00233b

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 journalArticle

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AU - Luo, Yi

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AU - Kinloch, Ian A.

AU - Ulijn, Rein V.

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