Y-doped ZnO films for acetic acid sensing down to ppb at high humidity

Nicolay J. Pineau, Frank Krumeich, Andreas T. Güntner & Sotiris E. Pratsinis
Acetic acid is a potential breath marker for cystic fibrosis and gastroesophageal reflux. Also, it is a key tracer for aroma development in the food industry for chocolate and coffee processing. However, its selective detection down to relevant parts per billion (ppb) concentrations under realistic relative humidity (RH) is most challenging, especially with low-cost sensors. Here, highly porous Y-doped ZnO films for sensing acetic acid down to 10 ppb within 2 min at 90% RH...
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