Figure 1: (a) XRD patterns, photographs of dispersions and (b) Raman spectra of GO and rGO samples

Figure 2: (a) FESEM image of Pt-IDE. (b), (c) and (d) few layers of rGO with different magnifications

Figure 3: Temperature dependence of the resistance of rGO sensor. Inset shows I-V characteristics at 100, 300, and 400 K

Figure 4: R-T characteristics of rGO sensor (a, b) at different temperature ranges, (c) at 275K and 300 K for warming and cooling cycles