Fig. 4. Materials hardness (a) and reduced modulus (b) of 40 indents at a maximum load of 1 mN load. LGES (lemongrass extracted solution) membrane, LGDM (lemongrass dissolved mixture) membrane, LGES/GO (graphene oxide mixed with LGES (5/95 (w/w))) membrane and LGDM/GO (graphene oxide mixed with LGDM (5/95 (w/w))) membrane. Error bars indicated standard deviation.
