Table 2.

The facet area and area ratio of copper oxide polyhedral materials. Calculation based on the SEM images.

Sample	Surface Composition	Facet Area (µm)2 on Single Particle				The Area Ratio of Facet on the Single Particle (%)				The Intensity Ratio of Cu2O (111) and Cu2O (200) * γ(111)/(200)
		(111)	(110)	(100)	(011)	(111)	(110)	(100)	(011)
CC1	Cu2O/CuO	0.043	0.139	0.131	0.098	13.93	22.51	31.82	31.71	3.03
CC2			0.043	0.066	0.018		24.16	55.62	20.22	1.75
CC3		0.012	0.043	0.102	0.038	8.11	14.53	51.69	25.68	2.91
CC4		0.017	0.038	0.235	0.029	7.05	7.88	73.06	12.02	3.07
CC5		0.240				100				3.10

* The intensity ratios γ of copper oxide (200) and (111) planes may be evidence of the higher sensing/electrocatalytic activity due to the shifting toward lower potential values of initial glucose oxidation.