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Amperometric responses of (A) GOX/CNT-1-, (B) GOX/CNT-2-, (C) GOX/CNT-3-, and (D) GOX/CNT-4-modified GC electrodes to successive additions of 100 μL of 0.1 M glucose to 40 mL of 0.1 M PBS solution. Solution was stirred at 150 rpm. Applied potential: −0.48 V vs Ag/AgCl.
