Various characteristic of Carbon nanotubes film methane Gas sensor

Various sensing characteristic of Carbon nanotube synthesized by low press chemical vapor deposit (LPCVD) method have been studied. The composite sensing film of silicon dioxide and multi-wall nanotubes (SiO2-MWNTs) is sensitive to methane. The various characteristic such as sensitivity, repeatability, reliability and cross-sensitivity Of SiO2-NfWNTs composite film gas sensor have been studied. Having been tested in methane 3 times, the sensor keeps the sensitivity steady, which means the sensor has a good repeatability. In concentration recognizing, the temperature is a interfere factor and always lead to error result. It is eliminated using neural network (NN) recognized system.