Figure 5: Tunable electrical properties of the GO sheets with varying the O/C composition.
From: Monolithic graphene oxide sheets with controllable composition

(a,b) Transfer characteristics of the GO sheets with different O/C compositions of 0.80 (type II, a) and 0.32 (type III, b) measured at temperatures ranging from 20 to 300 K (Vds=0.01 V). (c,d) Minimum conductivity σmin of the GO sheets with different O/C compositions of 0.80 (type II, c) and 0.32 (type III, d) at three different values of bias voltage (Vds) ranging from 0.01 to 1 V as a function of T−1/3.