Table 1. Typical techniques for reduction of GO and their properties.

Technique	Mechanism	Reduction degree	Conductivity or resistivity	Ref
Chemical reaction	mixture acids	C/O:5.28 ID/IG:1.32	1251 S/m	5
	modified GO	ID/IG:1.36	1660 S/m	6
Thermal treatment	mixture GO dispersion	C/O: 6.59 ID/IG:1.35	5746 Ω/sq	7
	polycarbonate matrix	C/O:6.0	410 S/m	8
Photo-chemical reaction	UV lamp of GO suspension	C-OH, C = O, O = C-OH (%): 76%, 85% and 81% decrease	4.6 × 106 Ω/sq	9
	Hg lamp of GO sheet and chemical suspension	ID/IG:0.08 (single layer)	7.1 × 104 Ω/sq	10
Laser reduction	Excimer laser for GO solution	C/O: 40	100–500 Ω/sq	11
	Diode laser for GO sheet	C–C (%): 69.2	3830 S/m	12