Fig. 7b showsthe repeatability of liquid sensitivity behavior of the 3D networkstructured composites when the composites are immersed intotoluene. Toluene is detected reproducibly with a short responsetime during the five immersion-drying cycles, which indicates the easy disconnection and recovery of the conducting paths in the 3D conductive network structure, indicating the high potential of these composites for the fabrication of high performance liquid sensing materials.