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Issue 35, 2018
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Nanoscale electromechanical properties of template-assisted hierarchical self-assembled cellulose nanofibers

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Abstract

Cellulose, a major constituent of our natural environment and a structured biodegradable biopolymer, has been shown to exhibit shear piezoelectricity with potential applications in energy harvesters, biomedical sensors, electro-active displays and actuators. In this regard, a high-aspect ratio nanofiber geometry is particularly attractive as flexing or bending will likely produce a larger piezoelectric response as compared to axial deformation in this material. Here we report self-assembled cellulose nanofibers (SA-CNFs) fabricated using a template-wetting process, whereby parent cellulose nanocrystals (CNCs) introduced into a nanoporous template assemble to form rod-like cellulose clusters, which then assemble into SA-CNFs. Annealed SA-CNFs were found to exhibit an anisotropic shear piezoelectric response as directly measured using non-destructive piezo-response force microscopy (ND-PFM). We interpret these results in light of the distinct hierarchical structure in our template-grown SA-CNFs as revealed by scanning electron microscopy (SEM) and high resolution transmission electron microscopy (TEM).

Graphical abstract: Nanoscale electromechanical properties of template-assisted hierarchical self-assembled cellulose nanofibers

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Publication details

The article was received on 19 Jun 2018, accepted on 18 Jul 2018 and first published on 30 Aug 2018


Article type: Paper
DOI: 10.1039/C8NR04967J
Citation: Nanoscale, 2018,10, 16812-16821
  • Open access: Creative Commons BY license
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    Nanoscale electromechanical properties of template-assisted hierarchical self-assembled cellulose nanofibers

    Y. Calahorra, A. Datta, J. Famelton, D. Kam, O. Shoseyov and S. Kar-Narayan, Nanoscale, 2018, 10, 16812
    DOI: 10.1039/C8NR04967J

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