Visible evidence to magnetism of graphene oxide

TL;DR

This paper demonstrates that graphene oxide can be directed and deposited using an external magnetic field, revealing its ferromagnetic properties and opening new avenues for magnetic-oriented applications of 2D carbon materials.

Contribution

It provides the first direct visual evidence of magnetism in graphene oxide through magnetic field-induced migration and deposition.

Findings

Graphene oxide can be moved and deposited under a magnetic field.

Ferromagnetism in graphene oxide is observable, though weaker than iron.

The method suggests potential for magnetic-oriented applications of graphene oxide.

Abstract

Graphene oxide continues to amaze scientific community for multiple potentials in a broad span of applications such as catalysts, adsorbents, oxidants, etc., determined by constant unveiling of its fantastic natures. Of them, magnetism is not ultimately identified and directly observed by naked eyes. Herein, we report graphene oxide directionally migrated and deposited together simply under external magnetic field from common Nd-Fe-B magnet, whereas the ferromagnetism of graphene oxide did not exhibit that strong as iron. Therefore, we illustrated this interesting pathway to keep close to such 2D carbon materials and potentially promoted magnetic-oriented applications.