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. 2017 Mar 3;7:43181. doi: 10.1038/srep43181

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Cyclic voltammograms of modified electrodes: (a) MWCNT/Fe₃O₄/2,3-Nc (b) MWCNT/Fe₃O₄/29H,31H-Pc in pH 7.2 PBS containing 0.085 mM of DA at scan rate of 25–1000 mV s⁻¹. (c,d) Are their respective plots of peak current vs. square root of scan rate.