2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Novel Nanostructures for Solid State Alcohol Breath Analyzers

A. Tricoli, M. Righettoni, S.E. Pratsinis
Particle Technology Laboratory, CH

solid solution, gas sensor, ethanol, humidity, selectivity

Solid state alcohol breath analyzers are commonly used by the law enforcement authorities, due to high sensitivity toward ethanol, their portability and fair response and recovery times. The main drawback of the exploitation of SnO2 as sensing material is its high cross-sensitivity to humidity, which requires expensive and elaborated systems for preparation of the gas probe. Here, synthesis of novel SnO2-TiO2 nanostructures with drastically reduced cross-sensitivity to humidity and high sensitivity to ethanol have been obtained by flame spray pyrolysis. In conclusion, the SnO2/TiO2 nanostructures are a highly performing material for alcohol breath analyzers with the potential of strongly reducing the cost of such devices.

Nanotech 2008 Conference Program Abstract