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Nano Convergence
Fig. 5 | Nano Convergence

Fig. 5

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. 5

a I–V curves for pH sensing performances and (inset in a) variation in response voltage of the 5% CO/CZO heterostructure–based electrode. b Variation in sensitivity of bare ZnO nanorods and the 3%, 5%, 7%, and 9% CO/CZO heterostructure. c Variation in response time of the 5% CO/CZO heterostructure–based device and its corresponding sensitivity determined by the d calibration plot. e Variation in sensitivity of the bare ZnO-based device and the 5% CO/CZO heterostructure–based device after immersion for 25 min in solutions of different pH values to demonstrate their chemical stability. f Variation in sensitivity and linearity of the 5% CO/CZO heterostructure–based device, when it was deformed mechanically as a sketch in inset-(ii), while inset (i) shows stress–strain plot of bare PET, ZnO/PET, Co-doped ZnO/PET, and CO/CZO heterostructure/PET-based samples

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