4.4.2 Chemical NanoSensors and Microsystems for Air Pollution Detection
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 4.4 EU NetAir (Special Session) I
- Author(s)
- J. Morante - Departament d’Electrònica, Universitat de Barcelona (Spain)
- Pages
- 380 - 383
- DOI
- 10.5162/IMCS2012/4.4.2
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
The understanding chemical to electrical transduction mechanisms at the nano scale level becomes a fundamental issue for developing and designing feasible and reliable gas sensors. Air pollution detection requires the simultaneous detection of oxidizing and reducing gases in the presence of many potential interfering molecules, especially water, under stable conditions and avoiding sensor degradation. In this contribution, on the base of the analysis performed on individual nanowire platforms, the transduction mechanisms at the nano scale level and associated kinetics are revised considering the influence of the temperature and illumination as well as the consequences of the pulsed or steady working modes on the signal threshold, selectivity and stability of the conductometric solid state based gas sensors. Potential integration of multiple sensors as multifunctional systems is also discussed and implemented including filters, pre-concentrators in several configurations including that of the integrated gas chromatography.