Development Of MWCNT Nano-Composite Materials As Gas Sensor

This book is aimed at developing a gas sensor to prevent air pollution. Chitosan is the second biopolymer in nature. Chitosan-based nanocomposite gas sensors clearly show the same sensitivity as carbon dioxide, carbon monoxide and oxygen. Besides human health, toxic gases are harmful for both animal and plant health. Various concentrations cause so many fatal or permanent problems. Therefore, controlling toxic gases (carbon monoxide, carbon dioxide), and oxygen at the indoor environment is of vital importance. In this study, effect of gold nanoparticle doping on the gas sensing properties of chitosan-based conductive polymers were investigated via acoustic wave and electrical based techniques. In this study, quartz crystal microbalance technique was used. Quartz Crystal Microbalance is a powerful technique for nano scale determination of the sorption properties of materials. According to Sauerbrey relation, the mass change on quartz crystal electrode cause a certain shift in the resonant frequency of a vibrating crystal oscillator. This shift can be monitored using QCM method.