Monitoring of NH3 gas by LB polypyrrole-based SAW sensor

Surface acoustic wave ammonia sensor based on ZnO/SiO2 composite film

“…Detection of NH 3 in trace amounts is important in terms of environmental protection and human health, as well as industry production. In recent years, numerous materials including semiconducting oxide materials, such as ZnO [1,2], ZrO 2 [3], CdO [4] and TiO 2 [5], organic compounds [6,7] and novel materials such as carbon nanotubes [8] and graphene [9,10] are exploited for ammonia detection due to their superior ammonia gas sensing properties. Composite system based sensors have been demonstrated good sensitivity and selectivity to a particular gas [11,12] by varying the type and composition of the components of the composite such as metal oxide-metal oxide [1,13], novel materials (carbon nanotube and graphene)-metal oxide [9,14], polymer-metal oxide [8,15] etc.…”

Application of chemically synthesized conducting polymer-polypyrrole as a carbon dioxide gas sensor

“…Many conducting polymers have shown changes in resistivity on expose to different gases and humidity. Polypyrrole (PPy) composite films are highly sensitive to gases but they show a saturation effect at higher concentration of gases [9][10][11]. Komilla Suri et al [12] reported that iron oxide-polypyrrole nanocomposite sensors showed the maximum response to CO 2 gas as compared to N 2 and CH 4 gases.…”

Using a PEDOT:PSS modified electrode for detecting nitric oxide gas

“…Recently, conducting polymers, such as polythiophene, polyaniline, and polypyrrole, have become an attractive class of materials for gas sensing applications [6][7][8][9]. They can be easily synthesized by a simple synthesis procedure, and especially, they can detect the analyte gases with satisfactory sensitivity at room tem-perature.…”