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Nano Convergence
Fig. 4 | Nano Convergence

Fig. 4

From: A dual-functional flexible sensor based on defects-free Co-doped ZnO nanorods decorated with CoO clusters towards pH and glucose monitoring of fruit juices and human fluids

Fig. 4

High-resolution core-level XPS a-i O1s and b-i Zn2p spectra of bare ZnO. a-ii, b-ii, c O1s, Zn2p, and Co2p spectra for the 5% CO/CZO heterostructure, respectively. d Mott–Schottky plot for the 5% CO/CZO. e Variation in EFB and ND of the bare ZnO and the 3%, 5%, 7%, and 9% CO/CZO heterostructures. f EIS plot of the bare ZnO and 3%, 5%, 7%, and 9% CO/CZO heterostructures, where Cdl, Re, Rct, and Zw correspond to the double-layer capacitance, electrolyte, charge transfer, and Warburg resistance, respectively, of the equivalent circuit shown in the inset

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