Reduced Graphene Oxide as an Excellent Temperature Sensor

In this study we demonstrated an efficient way to fabricate a reduced graphene oxide (rGO) temperature sensor and studied its sensing properties. The sensor device was fabricated by drop casting of the GO solution directly onto platinum inter-digital electrodes (Pt-IDE) and then reduced to rGO by low-temperature annealing and hydrazine vapor treatment. X-Ray diffraction and Raman spectroscopy were used to characterize the structural properties of the device. The temperature sensing properties of rGO were measured from 100-400 K and found that the resistance decreases exponentially with increasing temperature. The conductance of rGO sensor was following exactly the behavior of a standard temperature controller. The high sensitivity, stability and repeatability of the rGO sensor observed, are favorable for its temperature sensing applications.