@article {Diamantopoulou2017,
	title = {Magnetism in pristine and chemically reduced graphene oxide},
	journal = {Journal of Applied Physics},
	volume = {121},
	number = {4},
	year = {2017},
	note = {cited By 25},
	abstract = {The evolution of magnetism for graphene oxide (GO) before and after chemical reduction was investigated by means of static magnetization and electron spin resonance (ESR) spectroscopy. Strong paramagnetism with a saturation magnetization of \~{}1.2 emu/g and weak antiferromagnetic interactions were identified in pristine GO. Apart from spin-half defect centers, ESR spectroscopy indicated the excitation of high spin states, consistently with the high spin (S = 2) magnetic moments derived from the magnetization analysis, corroborating the formation of spatially "isolated" magnetic clusters in GO. A marked reduction of GO{\textquoteright}s magnetization (\~{}0.17 emu/g) along with an appreciable rise of diamagnetism (-2.4 {\texttimes} 10-6emu/g Oe) was detected after chemical reduction by sodium borohydride, reflecting the drastic removal of paramagnetic defects and the concomitant growth of sp2 domains in reduced graphene oxide (rGO). ESR revealed a large drop of the spin susceptibility for rGO, which, in addition to the main paramagnetic Curie component, showed an appreciable Pauli contribution. The latter together with the g-factor shift and the broadening of the ESR line indicated the coupling of localized spins with conduction electrons. The rGO ESR signal presented a metallic line shape, which could be analyzed in terms of two separate spectral components, a broad one that may be related to defect states strongly coupled with itinerant spins within the sp2 clusters and a narrow one due to edge/vacancy defect spins, indicative of rGO{\textquoteright}s persistent structural inhomogeneity. {\textcopyright} 2017 Author(s).},
	doi = {10.1063/1.4974364},
	url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85010370198\&doi=10.1063\%2f1.4974364\&partnerID=40\&md5=f72a2369d1734858f4a9c7e7ff75ac00},
	author = {Diamantopoulou, A. and Glenis, S. and Zolnierkiwicz, G. and Guskos, N. and V. Likodimos}
}
