Figure 4
Electrical testing diagram, TEM micrograph, I - V curves, and the corresponding resistivities. (a) Electrical testing diagram of the CNNC arrays; (b) TEM micrograph of a CNNC pressed by the platinum cylindrical tip; (c and d) I-V curves and the corresponding resistivities of the samples prepared at CH4/N2 feeding gas ratios of 1/80, 1/40, 1/20, 1/10, and 1/5.