The superior liquid sensing performance combined with the bal-anced electrical conductivity and good reproducibility at a low RGOloading can be well understood by considering the microstructuraldevelopments in the 3D conductive network composites during theliquid sensing tests. The original samples show a perfect 3D con-ductive network of RGO with high electrical conductivity at a lowRGO loading. Nevertheless, the samples swell when exposed to avolatile organic solvent, causing the disconnection of the RGO net-work, and thus leading to a decrease of conductivity. During theimmersing-drying process, the desorption of the solvents resultedin the reestablishment of the RGO network