5.1.5 Multimodal gas detection using molecular materials
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 5.1 Impedance-based Sensing
- Author(s)
- M. Bouvet, J. Suisse, T. Sizun, A. Kumar, G. Barochi, B. De Fonseca - Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), Université de Bourgogne (France), J. Rossignol - Laboratoire Interdisciplinaire Carnot de Bourgogne, Université de Bourgogne (France)
- Pages
- 428 - 431
- DOI
- 10.5162/IMCS2012/5.1.5
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
In the field of sensors, molecular materials present interesting and potentially valuable features as sensing elements for real gas sensor applications. We review the different types of conductimetric transducers. Among them, resistors have been historically the most commonly exploited way for the detection and quantification of gas pollutants. Herein, we focus on new transducers, either based on the well-known OFETs, or on transducers combining two molecular materials, namely the p-n junctions and the brand new Molecular Semiconductor - Doped Insulator (MSDI) heterojunctions. We also show how a molecular material-based microwave transducer can be used to detect ammonia. The adsorption of a target gas on a material induces a change in several physical parameters, such as the dielectric constant, the work function or the conductivity. The use of different transducers sensitive to the variation of these parameters appears to be a relevant methodology worthy of investigation.