Abstract

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. Three families of ceramic planar sensors based on a zinc oxide (ZnO) layer overlapped by screen-printed Pd-doped carboxyl groups functionalized multi-walled carbon nanotubes (Pd-COOH-MWCNTs) or by blocks of vertically aligned MWCNTs or by graphite as such and functionalized with fluorinated or nitrogenous functional groups were studied. These sensors were almost insensitive to humidity, while all of them gave a good response in NH3 atmosphere, starting from about 45 ppm in the case of zinc oxide with fluorinated or nitrogenous MWC-NTs and graphite or 50 ppm for Pd-COOH-MWCNTs sensors. These results are not actually as good as those reported in the literature, but this preliminary work proposes simpler and cheaper processes to realize NH3 sensor for room temperature applications.

Autore Pugliese

• Sardella Eloisa

Tutti gli autori

• J-M. Tulliani; A. Cavalieri; S. Musso; E. Sardella; F. Geobaldo

Titolo volume/Rivista

Sensors and actuators. B, Chemical

Anno di pubblicazione

2011

ISSN

0925-4005

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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