Unexpected Room Temperature Ferromagnetism of a Ball-Milled Graphene Oxide-Melamine Mixture

Vladimir P Vasiliev; Eugene N Kabachkov; Alexander V Kulikov; Roman A Manzhos; Iurii G Morozov; Yury M Shulga

doi:10.3390/molecules27227698

Unexpected Room Temperature Ferromagnetism of a Ball-Milled Graphene Oxide-Melamine Mixture

Molecules. 2022 Nov 9;27(22):7698. doi: 10.3390/molecules27227698.

Authors

Vladimir P Vasiliev¹, Eugene N Kabachkov¹, Alexander V Kulikov¹, Roman A Manzhos¹, Iurii G Morozov², Yury M Shulga^{1

3}

Affiliations

¹ Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of RAS, Acad. Semenov Ave., 1, 142432 Chernogolovka, Russia.
² Merzhanov Institute of Structural Macrokinetics and Materials Science of RAS, Acad. Osipyan St., 8, 142432 Chernogolovka, Russia.
³ Department of Functional Polymer Materials, National University of Science and Technology MISIS, Leninsky Ave., 4, 119049 Moscow, Russia.

Abstract

Nitrogen-doped carbon nanomaterial (NDCNM) was synthesized by grinding a mixture of graphene oxide and melamine in a planetary mill with both balls and milling chamber of zirconium dioxide. In the electron spin resonance spectrum of NDCNM, a broad signal with g = 2.08 was observed in addition to a narrow signal at g = 2.0034. In the study using a vibrating-sample magnetometer, the synthesized material is presumably a ferromagnet with a coercive force of 100 Oe. The specific magnetization at 10,000 Oe is approximately 0.020 and 0.055 emu/g at room temperature and liquid nitrogen temperature, respectively.

Keywords: ball-milling; electron spin resonance; graphene oxide; melamine; room temperature ferromagnetism.

Grants and funding

This research received no external funding.