A decreasing trend is seen in the average grain size with the MnFe 2 O 4 nanoneedle composite (M-nr/rGO) displaying the least value of 77 ± 2 nm.
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Enhanced electrochemical activities of morphologically tuned MnFe<sub>2</sub>O<sub>4</sub> nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes.
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