01313nas a2200157   4500008004100000022001400041245006700055210006700122260007300189300001000262490000800272520073600280100001601016700002501032856009801057       2014                        eng d  a0009-261400aFerromagnetism at room temperature in activated graphene oxide0 aFerromagnetism at room temperature in activated graphene oxide  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcJUN  a89-920 v6053 a<p>High room temperature ferromagnetic moment with high Curie temperature (&gt;700 K) for graphene oxide (GO) is obtained by a simple chemical activation using phosphoric acid followed by heat treatment at 800 degrees C. The field and temperature variations of the magnetization data indicate ferromagnetic, paramagnetic and diamagnetic contributions in the acid/heat treated sample. IR spectroscopic studies suggest hydrogenation (reduction) of GO after the acid and heat treatments. The results point to the role of defects, extent of hydrogenation, changes in the bonding characteristics and the nature of the functional groups in determining the different magnetic contributions. (C) 2014 Elsevier B.V. All rights reserved.</p>1 aRaj, Govind1 aJoy, Pattayil, Alias  uhttps://library.ncl.res.in/content/ferromagnetism-room-temperature-activated-graphene-oxide-0