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  • Plasma-electric field controlled growth of oriented graphene for energy storage applications

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    Ostrikov201498-Accepted.pdf (975.9Kb)
    Author(s)
    Ghosh, Subrata
    Polaki, SR
    Kamruddin, M
    Jeong, Sang Mun
    Ostrikov, Kostya Ken
    Griffith University Author(s)
    Ostrikov, Ken
    Year published
    2018
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    Abstract
    It is well known that graphene grows as flat sheets aligned with the growth substrate. Oriented graphene structures typically normal to the substrate have recently attracted major attention. Most often, the normal orientation is achieved in a plasma-assisted growth and is believed to be due to the plasma-induced in-built electric field, which is usually oriented normal to the substrate. This work focuses on the effect of an in-built electric field on the growth direction, morphology, interconnectedness, structural properties and also the supercapacitor performance of various configurations of graphene structures and reveals ...
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    It is well known that graphene grows as flat sheets aligned with the growth substrate. Oriented graphene structures typically normal to the substrate have recently attracted major attention. Most often, the normal orientation is achieved in a plasma-assisted growth and is believed to be due to the plasma-induced in-built electric field, which is usually oriented normal to the substrate. This work focuses on the effect of an in-built electric field on the growth direction, morphology, interconnectedness, structural properties and also the supercapacitor performance of various configurations of graphene structures and reveals the unique dependence of these features on the electric field orientation. It is shown that tilting of growth substrates from parallel to the normal direction with respect to the direction of in-built plasma electric field leads to the morphological transitions from horizontal graphene layers, to oriented individual graphene sheets and then interconnected 3D networks of oriented graphene sheets. The revealed transition of the growth orientation leads to a change in structural properties, wetting nature, types of defect in graphitic structures and also affects their charge storage capacity when used as supercapacitor electrodes. This simple and versatile approach opens new opportunities for the production of potentially large batches of differently oriented and structured graphene sheets in one production run.
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    Journal Title
    Journal of Physics D: Applied Physics
    Volume
    51
    Issue
    14
    DOI
    https://doi.org/10.1088/1361-6463/aab130
    Copyright Statement
    © 2018 Institute of Physics Publishing. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher.Please refer to the journal's website for access to the definitive, published version.
    Subject
    Physical sciences
    Engineering
    Publication URI
    http://hdl.handle.net/10072/384745
    Collection
    • Journal articles

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