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Iron-oxide nanoparticles supported on sepiolite as a novel humidity sensor

In the present work, a new humidity sensor based on nanostructured hematite deposited by a wet chemical route on a low-cost natural inorganic phylosilicate (sepiolite) powder was obtained. The nanometric character of these particles has been evaluated by X-ray diffraction, thermal gravimetric analysis (TGA) and differential thermal analysis (DTA) and transmission electron microscopy.

Development of a porous layer catalytically activated for improving gas sensors performances

A screen-printed thick film was developed to be overlapped to a gas sensing device for preserving it from contamination and degradation occurring in hostile environments, and also for improving its selectivity to a single pollutant gas when exposed to a complex atmosphere. This protective layer incorporated Al2O3 doped with Cs or Ba oxides as a catalyst material for eliminating gaseous interfering species, precisely CO2, to improve sensor response to CO.

Room temperature ammonia sensors based on zinc oxide and functionalized graphite and multi-walled carbon nanotubes

In this work, different techniques are proposed to realize ammonia (NH3) sensors working at room temperature and a preliminary electrical characterization under water vapor and in NH3 atmospheres is presented.

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