Magnetism in graphene oxide induced by epoxy groups
- Univ. of Cambridge (United Kingdom). Cavendish Lab.; Nanyang Technological Univ. (Singapore)
- Yonsei Univ., Seoul (South Korea); Sungkyunkwan Univ., Suwon (South Korea)
- Nanyang Technological Univ. (Singapore)
- Univ. of Cambridge (United Kingdom). Cavendish Lab.; Argonne National Lab. (ANL), Argonne, IL (United States)
In this work, 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 is 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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Research Foundation (NRF) (Korea); Ministry of Education (MoE) (Singapore)
- Grant/Contract Number:
- AC02-06CH11357; NRF-2013R1A6A3A060443; 2013-T2-2-049
- OSTI ID:
- 1391691
- Journal Information:
- Applied Physics Letters, Vol. 106, Issue 17; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Fabrication of graphene oxide-lead oxide epoxy based composite with enhanced chemical resistance, hydrophobicity and thermo-mechanical properties
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journal | December 2018 |
Applications of Graphene and Its Derivatives in Chemical Analysis
|
journal | November 2019 |
Supramolecular Complexes of Graphene Oxide with Porphyrins: An Interplay between Electronic and Magnetic Properties
|
journal | February 2019 |
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