Enhanced ferromagnetism in edge enriched holey/lacey reduced graphene oxide nanoribbons

Publication date: 15 October 2017
Source:Materials & Design, Volume 132
Author(s): Vikrant Sahu, V.K. Maurya, Gurmeet Singh, S. Patnaik, Raj Kishore Sharma
Incorporation of magnetism in graphene based compounds holds great promise for potential spintronic applications. By optimizing point defects and high edge density of defects, we report many-fold increase in the ferromagnetic saturation moment in lacey/holey reduced graphene oxide nanoribbons (LRGONR) as compared to other graphene derivatives. The samples were synthesized using chemical unzipping methodology. Detailed structural and morphological characterizations are discussed that include XRD, Raman, SEM, HRTEM and XPS measurements. Brilluoin function analysis to magnetization data reflects best fit for J=7/2 with a saturation moment of 1.1emu/g. The microscopic origin of magnetization in LRGONR is assigned to high edge defect density which has also been correlated to microstructure.

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