Additional file 1 of Design of Double-Shelled CuS Nanocages to Optimize Electrocatalytic Dynamic for Sensitive Detection of Ascorbic Acid

Additional file 1: Figure S1. (a) FESEM image and (b) TEM image of 1-CuS NCs. Figure S2. (a) FESEM image of Cu2O. Figure S3. CVs of bare GCE at 50 mV s-1. Figure S4. CVs of 50 μM AA on 2-CuS NCs/GCE at different scan rates (16, 25, 36, 49, 64, 81 and 100 mV s-1). Figure S5. Chronoamperograms of (a) 2-CuS NCs/GCE and (b) 1-CuS NCs/GCE in the absence and presence of 0.5 mM AA; (c) Calibration curve of Icat versus t-1/2; (d) Calibration curve of Icat/IL versus t1/2.