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Magnetism in graphene oxide induced by epoxy groups

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4919529· OSTI ID:1391691
 [1];  [2];  [3];  [4];  [3]
  1. Univ. of Cambridge (United Kingdom). Cavendish Lab.; Nanyang Technological Univ. (Singapore)
  2. Yonsei Univ., Seoul (South Korea); Sungkyunkwan Univ., Suwon (South Korea)
  3. Nanyang Technological Univ. (Singapore)
  4. 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
OSTI ID:
1391691
Journal Information:
Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 17 Vol. 106; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English

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Cited By (4)

Fabrication of graphene oxide-lead oxide epoxy based composite with enhanced chemical resistance, hydrophobicity and thermo-mechanical properties journal December 2018
Emerging chemical strategies for imprinting magnetism in graphene and related 2D materials for spintronic and biomedical applications journal January 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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