Enhanced Ferromagnetism in Lacey Reduced Graphene Oxide Nano-ribbon

TL;DR

This paper demonstrates a significant enhancement of ferromagnetism in lacey reduced graphene oxide nanoribbons through defect engineering, showing promise for spintronic applications.

Contribution

It reports a novel synthesis method that increases ferromagnetic saturation in graphene derivatives by optimizing defect density and edge structure.

Findings

Ferromagnetic saturation moment increased to 1.1 emu/g

High edge defect density correlates with enhanced magnetism

Structural analysis confirms defect-related origin of magnetism

Abstract

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 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 1.1 emu/g. The microscopic origin of magnetization in LRGONR is assigned to high edge defect density which has also been correlated to microstructure.