A miniaturized chemocapacitor system for the detection of volatile organic compounds

Wireless Sensor Network Based on a Chemocapacitive Sensor Array for the Real-time Monitoring of Industrial Pollutants

“…Each IDE is coated with a different polymeric material forming an InterDigitated Capacitor (IDC). The IDC array is integrated with an electronic module that allows for the operation, control and data transfer to a PC or other unit with data storage and processing capabilities [8]. The polymers were selected on the basis of different selectivity to the vapor analytes of interest (EtOAc: ethyl acetate and water).…”

Gas Sensitivity Amplification of Interdigitated Chemocapacitors Through Etching

“…In chips 2A and 2B, the thickness of the Al electrodes is approximately 120 nm and the sensing area is designed to be 0.64 mm 2 . The dimensions of the sensing areas were selected so that the capacitance before and after sorption is within the range (0-21 pF) of a miniaturized read-out electronics module [14], that allows for facile measurement of the sensor response and easy implementation in applications at the field. In Fig.…”

“…The interconnects end to contact pads of 0.04 mm 2 area, for facile wire bonding in a DIL package. The packaged IDE arrays are integrated with the readout electronic module that allows for the operation, control and data transfer to a PC or other unit with data storage and processing capabilities [14].…”

“…In the applications related to the detection of analytes in air, IDEs are usually coated with polymeric materials with selective absorbance of particular analytes. The sorption of analyte's molecules, changes the dielectric constant of the polymeric coating that results in a capacitance change of the device that can be correlated to the concentration of the particular analyte [14]. In order to increase the capacitance change due to the sorption of analyte, several approaches have been explored.…”

A self-calibrated Wireless Sensing System for monitoring the ambient industrial environment. From lab to real-time application

“…For the dynamic measurements a dedicated fully computer controlled laboratory set-up able to deliver flows of controlled vapor concentrations of the analytes of interest is employed [24,25]. In Fig.…”