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|Title:||Magnetism in graphene oxide induced by epoxy groups||Authors:||Lee, Dongwook
Cole, Jacqueline M.
|Keywords:||DRNTU::Engineering::Materials||Issue Date:||2015||Source:||Lee, D., Seo, J., Zhu, X., Cole, J. M., & Su, H. (2015). Magnetism in graphene oxide induced by epoxy groups. Applied physics letters, 106(17), 172402-.||Series/Report no.:||Applied physics letters||Abstract:||We have engineered magnetism in graphene oxide. Our approach transforms graphene into a magnetic insulator while maintaining graphene's structure. Fourier transform infrared spectroscopy spectra reveal that graphene oxide has various chemical groups (including epoxy, ketone, hydroxyl, and C-O groups) on its surface. Destroying the epoxy group with heat treatment or chemical treatment diminishes magnetism in the material. Local density approximation calculation results well reproduce the magnetic moments obtained from experiments, and these results indicate that the unpaired spin induced by the presence of epoxy groups is the origin of the magnetism. The calculation results also explain the magnetic properties, which are generated by the interaction between separated magnetic regions and domains. Our results demonstrate tunable magnetism in graphene oxide based on controlling the epoxy group with heat or chemical treatment.||URI:||https://hdl.handle.net/10356/79407
|DOI:||10.1063/1.4919529||Rights:||© 2015 AIP Publishing LLC. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing LLC. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.4919529 ]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||MSE Journal Articles|
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