The experimental parameters used for the electrospinning preparation of various nanofiber membranes^a.

Sample	Core	Sheath	Voltage	Injecting Speed
P	8% PLA		+8.5 kV to 2.5 kV	0.86 mL h−1
S15	8% PLA + 15 mg mL−1 GO		+8.5 kV to 2.5 kV	0.86 mL h−1
C5	5 mg mL−1 GO	8% PLA	+8.5 kV to 2.5 kV	0.06 mL h−1 @ 0.8 mL h−1
C15	15 mg mL−1 GO	8% PLA	+8.5 kV to 2.5 kV	0.06 mL h−1 @ 0.8 mL h−1
C25	25 mg mL−1 GO	8% PLA	+8.5 kV to 2.5 kV	0.06 mL h−1 @ 0.8 mL h−1

^aP = pure PLA; S15 = single-axial structure with 15 mg mL⁻¹ of GO; C5 = co-axial structure with 5 mg mL⁻¹ of GO; C15 = co-axial structure with 15 mg mL⁻¹ of GO; C25 = co-axial structure with 25 mg mL⁻¹ of GO.