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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: J Magn Magn Mater. 2010 Jan 1;322(2):190–196. doi: 10.1016/j.jmmm.2009.07.086

Fig. 3.

Fig. 3

Elemental analysis of the Fe3O4 NPs which verified that the main elements in the NPs are Fe and O. Copper (Cu) element was detected as the sample holder is made of Cu and Carbon was detected due to the hexane traces on the surface of the Fe3O4 NPs.