Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Tuesday 19th September 2017 from 8.00am to 4.00pm (BST).

During this time our website performance may be temporarily affected. If you have any questions please use the feedback button available under our menu button. We apologise for any inconvenience this might cause and thank you for your patience.



A triboelectric generator based on self-poled Nylon-11 nanowires fabricated by gas-flow assisted template wetting

Author affiliations

Abstract

Triboelectric generators have emerged as potential candidates for mechanical energy harvesting, relying on motion-generated surface charge transfer between materials with different electron affinities. In this regard, synthetic organic materials with strong electron-donating tendencies are far less common than their electron-accepting counterparts. Nylons are notable exceptions, with odd-numbered Nylons such as Nylon-11, exhibiting electric polarisation that could further enhance the surface charge density crucial to triboelectric generator performance. However, the fabrication of Nylon-11 in the required polarised δ′-phase typically requires extremely rapid crystallisation, such as melt-quenching, as well as “poling” via mechanical stretching and/or large electric fields for dipolar alignment. Here, we propose an alternative one-step, near room-temperature fabrication method, namely gas-flow assisted nano-template (GANT) infiltration, by which highly crystalline “self-poled” δ′-phase Nylon-11 nanowires are grown from solution within nanoporous anodised aluminium oxide (AAO) templates. Our gas-flow assisted method allows for controlled crystallisation of the δ′-phase of Nylon-11 through rapid solvent evaporation and an artificially generated extreme temperature gradient within the nanopores of the AAO template, as accurately predicted by finite-element simulations. Furthermore, preferential crystal orientation originating from template-induced nano-confinement effects leads to self-poled δ′-phase Nylon-11 nanowires with higher surface charge distribution than melt-quenched Nylon-11 films, as observed by Kelvin probe force microscopy (KPFM). Correspondingly, a triboelectric nanogenerator (TENG) device based on as-grown templated Nylon-11 nanowires fabricated via GANT infiltration showed a ten-fold increase in output power density as compared to an aluminium-based triboelectric generator, when subjected to identical mechanical excitations.

Graphical abstract: A triboelectric generator based on self-poled Nylon-11 nanowires fabricated by gas-flow assisted template wetting

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 May 2017, accepted on 09 Aug 2017 and first published on 14 Sep 2017


Article type: Paper
DOI: 10.1039/C7EE01292F
Citation: Energy Environ. Sci., 2017, Advance Article
  •   Request permissions

    A triboelectric generator based on self-poled Nylon-11 nanowires fabricated by gas-flow assisted template wetting

    Y. S. Choi, Q. Jing, A. Datta, C. Boughey and S. Kar-Narayan, Energy Environ. Sci., 2017, Advance Article , DOI: 10.1039/C7EE01292F

Search articles by author

Spotlight

Advertisements