Figure 3 | Scientific Reports

Figure 3

From: Investigation on the structures and magnetic properties of carbon or nitrogen doped cobalt ferrite nanoparticles

Figure 3

SEM imagines for all C-doped CoFe2O4 samples with different citric acid concentration: (a) 0 mol·L−1, (b) 0.05 mol·L−1, (c) 0.1 mol·L−1, (d) 0.18 mol·L−1, (e) 0.3 mol·L−1, and (f) 0.5 mol·L−1, respectively. The inset in each picture is the amplifying results. The right picture is the simply formation process of the samples with the increase of citric acid concentration.

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