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

Nano Convergence

Table 2 Performance comparison of CO/CZO based glucose sensors with ZnO, CoO and their heterostructure either with a metal or a metal-oxide reported previously

Sample	Linear range (mM)	Sensitivity (µA mM⁻¹ cm⁻²)	The detection limit (µM)	Response time (s)	References
CO/CZO	0.04 –8.85	4565	0.15	~ 4	This study
5% Co-doped ZnO	0.04–8.85	3864	0.30	–	This study
Bare ZnO	0.0	2565	0.33	~ 10	This study
ZnO/CC	0.001–1.45	4792	0.43	3	[93]
CuO-ZnO	Upto 8.45	2961	0.4	–	[94]
ZnO nanocombs	0.02–4.5	1533	20	–	[95]
Au-ZnO NRs	0.001–15	4416	0.12	< 2	[96]
ZnO nanorods	0.6–1.4	1091	0.22	–	[97]
Porous ZnO-CuO hierarchical nanocomposites/FTO	0.00047–1.60	3066	0.21	1.2	[98]
Co₃O₄ nanosheets	Up to 0.31	12,970	0.058	< 10	[99]
ZnO–CoO/rGO	0.01–11.20	168.7	1.3	–	[100]
Co₃O₄/ZnO p–n junction	0.01–5	116.64	1.38	2	[101]