It is essential to understand and develop the ability to tune the magnetic properties of graphene-based materials to pursue prospective applications in nanoelectronics and spintronics. Graphene is known as a unique material that exhibits extraordinary electrical, mechanical, thermal, and optical properties. Even though these properties have been extensively explored, the magnetic properties are poorly defined owing to a lack of information. There are a few theoretical studies; however, studies providing experimental magnetic data are rare. Moreover, most of the available experimental data have dealt with graphene on a substrate rather than in the form of "flakes", either as thermally annealed or adatom graphene oxide (GO) flakes. Therefore, we chose to examine the properties of the flakes of GO before and after their "chemical modification" to systemically investigate the impact of such changes on their magnetic properties. GO flakes chemically functionalized by the covalent grafting of sulfates to their surfaces were examined in this study using two control factors: the absence/presence of the sulfates analyzed using three different reaction temperatures. The GO samples were characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). The essential magnetic properties were investigated using a physical property measurement system (PPMS) with a vibrating sample magnetometer (VSM) mode.<br/><b>KEYWORDS</b>: Magnetic Properties, Graphene Oxide Flakes, Sulfates, Functionalization.

Understanding and controlling the magnetic properties of chemically modified graphene oxide flakes using sulfates

251st National Meeting (2016)

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