Flexible, Magnetic, and Electrically Conductive Graphene/Fe₃O₄ Paper and Its Application for Magnetic-Controlled Switches

Abstract

The emerging field of free-standing and flexible paperlike materials based on graphene sheets has become the focus of considerable research in recent years because of the scientific and technological significance of these materials. In particular, multifunctional flexible graphene-based films or papers are in high demand for various applications. Herein, we report the fabrication of magnetic, electrically conducting, and flexible paper composed of graphene and nanoscale Fe3O4 particles made using a simple yet versatile solution-processed approach. The conductive, magnetic, and mechanical properties of these free-standing hybrid papers with different loadings of nanoscale Fe3O4 particles were investigated. In addition to the excellent electrical conductivity and mechanical strength, the obtained flexible graphene/Fe3O4 hybrid papers also show superparamagnetism, which can be tuned easily through modulation of the loading of Fe3O4 nanoparticles. Combining all of these outstanding properties, we have fabricated and demonstrated a magnetic-controlled conductive switch using these flexible and multifunctional graphene/Fe3O4 hybrid papers.

Magnetic Fe3O4-Reduced Graphene Oxide Nanocomposites-Based Electrochemical Biosensing

“…Graphite oxide (GO) was prepared from natural graphite by the modified Hummer's method [21,22]. The superparamagnetic Fe 3 O 4 -RGO nanosheets were prepared via solvothermal method with some modification of those reported literatures [23,24].…”

Magnetite/reduced graphene oxide nanocomposites: One step solvothermal synthesis and use as a novel platform for removal of dye pollutants

“…The synthesis of MRGO nanocomposites has been reported in the literature [32][33][34][35][36], but the methods involved are usually multistep or require some rigorous conditions and toxic, expensive raw materials. Previous work has shown that solvothermal reduction is an effective method of lowering the oxygen content and defect level in graphene sheets [37,38].…”

Preparation and Characterization of Water-based Magnetic Fluids

“…The liquid carrier can be selected by seal medium and working conditions which can be water, kerosene, or silicone oil [2][3][4][5][6] .Because of the special physical properties, chemical properties and fluid properties of water-based magnetic fluids, they can be widely used in mechanical, chemical, medical and other fields [7] , especially in hyperthermia.…”