Figure 3

SEM images of Pd-cells (a) Pd-cells-CNTs hybrid (b). Schematic illustration of the conductance measurement experiment which highlighted the improvement of electron transport via CNTs network in the Pd-cells-CNTs hybrid (c). I-V curves obtained by applying the gradually increased voltage across the split electrodes coated by Pd-cells and Pd-cells-CNTs hybrid, or without coating (d).