Journal of Materials Science

, Volume 45, Issue 23, pp 6374–6378

Bioinspired peptide nanotubes as supercapacitor electrodes

  • P. Beker
  • I. Koren
  • N. Amdursky
  • E. Gazit
  • G. Rosenman
IMEC 2009

DOI: 10.1007/s10853-010-4624-z

Cite this article as:
Beker, P., Koren, I., Amdursky, N. et al. J Mater Sci (2010) 45: 6374. doi:10.1007/s10853-010-4624-z

Abstract

Bioinspired materials offer new routes in nanotechnology. These materials are composed from chemically synthesized biomolecules and inspired by natural biological structures. They are self assembled into highly ordered nanostructures (nanotubes, nanospheres, etc.) from elementary building blocks of biological origin such as peptide and proteins. We developed a new technique of physical vapor deposition of peptide nanotubes (PNT) and applied it to electrochemical energy storage devices—supercapacitors (SC). In this work, aligned and homogenously distributed diphenylalanine PNT have been used to modify carbon electrodes for SC devices. Electrochemical properties of PNT coatings of different density and height, modifying carbon electrodes have been studied. We have found that aligned PNT arrays significantly increase the double layer capacitance of the carbon electrodes. The found enlargement of the PNT-modified electrode capacitance has been ascribed to increasing of usable electrode surface area of the carbon electrodes coated by PNT. We show that the critical factor of the accumulation process of the electrolyte ions at the PNT-modified electrode surface is a wetting process of the PNT nanoscale hydrophilic channels by aqueous electrolyte.

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • P. Beker
    • 1
  • I. Koren
    • 1
  • N. Amdursky
    • 1
    • 2
  • E. Gazit
    • 2
  • G. Rosenman
    • 1
  1. 1.The Iby and Aladar Fleischman Faculty of Engineering, Department of Physical Electronics, School of Electrical EngineeringTel Aviv UniversityTel AvivIsrael
  2. 2.George S. Wise Faculty of Life Sciences, Department of Molecular Microbiology and BiotechnologyTel Aviv UniversityTel AvivIsrael