Figure 4

EDS mapping across the wear track and weight % of elements at rGO concentration (a) 0.2 and (b) 1.0 mg mL−1, Tribology condition: Load: 500 mN, Linear speed: 0.5 cm/s, Ball: steel (dia. 2 mm).
EDS mapping across the wear track and weight % of elements at rGO concentration (a) 0.2 and (b) 1.0 mg mL−1, Tribology condition: Load: 500 mN, Linear speed: 0.5 cm/s, Ball: steel (dia. 2 mm).