Effect of surface morphology of ZnO layers deposited onto QCM on their sensing behavior during ethanol detectionстатья
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Дата последнего поиска статьи во внешних источниках: 14 февраля 2019 г.
Аннотация:In this work, we compare the performance characteristics of two different zinc oxide films
layered on a quartz crystal microbalance (QCM) as gas-sensing elements. The films were
prepared by different methods, i.e., RF sputtering on a QCM surface and drop-casting a colloid
of ZnO nanoparticles generated via laser ablation in liquid. Prior to use, both films were
characterized in terms of their surface morphology and chemistry, after which their gas sensing
properties were evaluated by using the QCM method. The film prepared from a laser-generated
material was much more porous than its sputtered counterpart. Gas sensing of ethanol using
the QCM coated with the two films showed that the sensing response differs depending on the
state of the detection film. This demonstrated that there is a correlation between the surface
characteristics and the gas adsorption characteristics of the sensors based on two different ZnO materials.