P1.7.14 Au nanoelectrodes below nanostructured SnO2 films for acetone detection during breath analysis
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- P1.7 Nanostructured Metal Oxide-based Sensors
- Author(s)
- M. Righettoni, A. Tricoliand, S. Pratsinis - Particle Technology Laboratory, ETH Zurich (Switzerland)
- Pages
- 1096 - 1098
- DOI
- 10.5162/IMCS2012/P1.7.14
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
New medical diagnostic methods such as non-invasive breath analysis bear the potential of drastically reducing medical costs as a greater amount of automatization is possible. Here, an asymmetric electrode assembly is described that increases the SnO2sensitivity and selectivity to acetone, a tracer for diabetes type-1, and reduces the resistance of the nanostructured SnO2layer. Gold nanoparticles serving as nanoelectrodes are stochastically deposited by flame spray pyrolysis (FSP) below a functional film decreasing the effective length of the resistive components. The feasibility of this assembly is demonstrated with solid state sensors having controlled resistance and exceptionally high sensitivity and selectivity to acetone. Au nanoparticles also enable detection of acetone at relatively low temperature with still high sensor response and signal to noise ratio.