Design, fabrication, and characterization of graphene thermistor

Abstract

This paper reported a new application of graphene that is graphened thermistor. Mono-layer, bi-layer and few-layer graphene devices with different dimensions were designed and fabricated. Temperature sensing behavior of graphene has been studied in a small temperature range from room temperature (RT) to 80°C because this range is important in electronic instrumentations and integrated circuit design. Thermal inertia of the graphenes was studied at a temperature of 80°C and the sensing behavior was characterized by measuring the time response of the normalized resistances. Our preliminary results demonstrated a higher negative temperature coefficient of the bilayer graphene those of mono-layer and few-layer graphenes. In addition, engineered graphene resistance based on its dimension has been investigated. This technique provides a strong candidate for temperature sensing in the micro and nano industrial applications with high reliability, high sensitivity and low cost.