Sensitive SWCNTs gas sensor fabricated on a flexible parylene-C substrate

Gas sensors are widely used in many applications including environmental safety, gas alarms and controlling manufacturing processes. However, traditional gas sensors have limitations of being large, bulky and less sensitive. Miniature, low cost, highly sensitive and fast response gas sensors with low power consumption are needed to fulfill the needs of emerging sensor applications. Single-Walled Carbon NanoTubes (SWCNTs), due to their superior physical properties and their high surface area to volume ratios, are promising candidates as miniature nanosensors. Furthermore, the recent progress in solution based assembly methods for making nano devices enabled the realization of nanotube based sensors on flexible polymeric substrates. [1]. In this paper, we present a flexible and robust SWCNTs based highly sensitive chemiresistor sensor for environmental monitoring applications.