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Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics

We report an investigation into the magnetic and electronic properties of partially hydrogenated vertically aligned few layers graphene (FLG) synthesized by microwave plasma enhanced chemical vapor deposition. The FLG samples are hydrogenated at different substrate temperatures to alter the degree o...

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Autores principales: Ray, Sekhar C., Soin, Navneet, Makgato, Thuto, Chuang, C. H., Pong, W. F., Roy, Susanta S., Ghosh, Sarit K., Strydom, André M., McLaughlin, J. A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3900929/
https://www.ncbi.nlm.nih.gov/pubmed/24457465
http://dx.doi.org/10.1038/srep03862
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author Ray, Sekhar C.
Soin, Navneet
Makgato, Thuto
Chuang, C. H.
Pong, W. F.
Roy, Susanta S.
Ghosh, Sarit K.
Strydom, André M.
McLaughlin, J. A.
author_facet Ray, Sekhar C.
Soin, Navneet
Makgato, Thuto
Chuang, C. H.
Pong, W. F.
Roy, Susanta S.
Ghosh, Sarit K.
Strydom, André M.
McLaughlin, J. A.
author_sort Ray, Sekhar C.
collection PubMed
description We report an investigation into the magnetic and electronic properties of partially hydrogenated vertically aligned few layers graphene (FLG) synthesized by microwave plasma enhanced chemical vapor deposition. The FLG samples are hydrogenated at different substrate temperatures to alter the degree of hydrogenation and their depth profile. The unique morphology of the structure gives rise to a unique geometry in which graphane/graphone is supported by graphene layers in the bulk, which is very different from other widely studied structures such as one-dimensional nanoribbons. Synchrotron based x-ray absorption fine structure spectroscopy measurements have been used to investigate the electronic structure and the underlying hydrogenation mechanism responsible for the magnetic properties. While ferromagnetic interactions seem to be predominant, the presence of antiferromagnetic interaction was also observed. Free spins available via the conversion of sp(2) to sp(3) hybridized structures, and the possibility of unpaired electrons from defects induced upon hydrogenation are thought to be likely mechanisms for the observed ferromagnetic orders.
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spelling pubmed-39009292014-01-24 Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics Ray, Sekhar C. Soin, Navneet Makgato, Thuto Chuang, C. H. Pong, W. F. Roy, Susanta S. Ghosh, Sarit K. Strydom, André M. McLaughlin, J. A. Sci Rep Article We report an investigation into the magnetic and electronic properties of partially hydrogenated vertically aligned few layers graphene (FLG) synthesized by microwave plasma enhanced chemical vapor deposition. The FLG samples are hydrogenated at different substrate temperatures to alter the degree of hydrogenation and their depth profile. The unique morphology of the structure gives rise to a unique geometry in which graphane/graphone is supported by graphene layers in the bulk, which is very different from other widely studied structures such as one-dimensional nanoribbons. Synchrotron based x-ray absorption fine structure spectroscopy measurements have been used to investigate the electronic structure and the underlying hydrogenation mechanism responsible for the magnetic properties. While ferromagnetic interactions seem to be predominant, the presence of antiferromagnetic interaction was also observed. Free spins available via the conversion of sp(2) to sp(3) hybridized structures, and the possibility of unpaired electrons from defects induced upon hydrogenation are thought to be likely mechanisms for the observed ferromagnetic orders. Nature Publishing Group 2014-01-24 /pmc/articles/PMC3900929/ /pubmed/24457465 http://dx.doi.org/10.1038/srep03862 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Ray, Sekhar C.
Soin, Navneet
Makgato, Thuto
Chuang, C. H.
Pong, W. F.
Roy, Susanta S.
Ghosh, Sarit K.
Strydom, André M.
McLaughlin, J. A.
Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics
title Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics
title_full Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics
title_fullStr Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics
title_full_unstemmed Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics
title_short Graphene Supported Graphone/Graphane Bilayer Nanostructure Material for Spintronics
title_sort graphene supported graphone/graphane bilayer nanostructure material for spintronics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3900929/
https://www.ncbi.nlm.nih.gov/pubmed/24457465
http://dx.doi.org/10.1038/srep03862
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