Table 8. The Raman shift and intensity of GO-SPCE, GOC4-SPCE, and ERGOC4-SPCE.

Materials on the SPCE working electrode	D band		G band		ID/IG
	Shift (cm-1)	Intensity (a.u.)	Shift (cm-1)	Intensity (a.u.)
GO-SPCE	1351.83	0.795	1592.33	0.813	0.98
GOC4-SPCE	1348.85	0.707	1588.36	0.747	0.95
ERGOC4-SPCE	1347.86	0.983	1596.33	0.655	1.50