Table 1.

Summary of most recent nonenzymatic CuO-based glucose sensors with their sensing characteristics as provided in the relevant references.

Electrocatalyst	Linear range (mM)	Detection Limit (mM)	Sensitivity (μA mM−1 cm−2)	pH	Ref.
CuO nanosheets	0.5–10	1 × 10−4	520	13	47
CuO nanospheres	0–2.56	1 × 10−3	405	13	48
CuO nanoflowers	0–5	1.71 × 10−3	2657	13	49
Carnation-like CuO Hierarchical Nanostructures	0–5.5	98 × 10−6	3150	13.2	50
Flower-like CuO hierarchical nanostructures	4.5 × 10−2–1.3 × 10−1	6.87 × 10−3	1710	13	51
CuO nanorods	0–5	220 × 10−6	1834	14	52
Sandwich-structured CuO	0–3.2	1 × 10−3	5343	13	53
Cu/Cu2O/CuO ternary composite hollow spheres	0–0.1	0.39 × 10−3	8726	13	54
CeO2@CuO core shell nanostructure	1–8.9	0.019 × 10−3	3319	13	55
Nanocomposites of CuO and single-wall carbon nanotubes	5 × 10−5–1.8	50 × 10−6	1610	13	56
CuO nanoparticles	0.21 × 10−3–12	0.21 × 10−3	700	13	57
Pt/CuO/Pt metal-oxide-metal	2.2–10	1.42	2921	7	This work