To intuitively observe and evaluate the 3D conductive struc-ture fabricated with the RGO@CNC nanohybrids in the NR matrix,the unvulcanized NR nanocomposite was etched with toluene toremove the NR matrix. The residual RGO@CNC nanohybrid skele-ton was characterized by SEM. As shown in Fig. 4a and b, uniformlyporous network of the RGO@CNC nanohybrids is observed clearly,