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. 2016 Mar 8;10:10. doi: 10.1186/s13065-016-0156-1

Fig. 5.

Fig. 5

TEM images of ε-Co NPs synthesized varying the reaction holding time. Synthesis conditions: injection temperature = 443 K, [Co][OA]=12.9, injection time = 5 s, and reaction holding time: a 300, b 1800 and c 7200 s. Their corresponding particle diameter distributions were obtained from evaluation of ~500 particles. Scale bars 50 nm