Heaterless Operation of Chemoresistive Gas Sensors for Further Functional Convergence

Abstract

Developing simple, low-cost, sensitive, and reliable gas sensors has been attracting great attraction due to promising applications to handheld devices such as smartphones, tablet computers, and remote air quality control. Simplicity in operation, high sensitivity, low cost, flexibility in production, and small size make chemoresistive gas sensors based on semiconducting materials including metal oxides and carbon nanomaterials as the prime candidate for the use in handheld devices over other types of gas sensors. In this chapter, we introduce the heaterless operation of chemoresistive gas sensors based on nanostructured metal oxide thin films to lower power consumption. Furthermore, we propose a route to develop high-performance chemoresistive gas sensors using 2-dimensional nanomaterials such as graphene, transition metal disulfide, and metal oxide nanosheets for room temperature operation which can dramatically reduce the power consumption.