Abstract
Nano-composite of the graphene (43 wt%), carbon nanotubes (43 wt%) and silicon adhesive (14 wt%) was synthesized and deposited in the form of 90 mu m thick films in-between two pre-deposited metallic electrodes through the doctor blade technology. It was observed that the impedance and the capacitance of the sensors changed with relative humidity up to -84.5 /%RH and 1336.7 pF/%RH, respectively. The change in impedance and resistance with temperature was equal to -19.8 /oC. The sensing range for temperature is 37-87 degrees C and that of relative humidity is 36 to 94%. For humidity sensing the response and recovery times are up to 26s and 74s, respectively. The fabricated sensors are attractive for commercialization in the form of humidity and temperature measuring instrument.