Publication detail

Gas sensitive ZnO structures with reduced humidity-interference

VALLEJOS VARGAS, S. GRÁCIA, I. PIZÚROVÁ, N. FIGUERAS, E. ČECHAL, J. HUBÁLEK, J. CANÉ, C.

Original Title

Gas sensitive ZnO structures with reduced humidity-interference

Type

journal article in Web of Science

Language

English

Original Abstract

Gas microsensors based on zinc oxide structures with rod- and needle-like morphology, both integrated via a non-catalyzed vapor-solid mechanism enabled using aerosol-assisted chemical vapor deposition, are developed. Analyses of the films via SEM, TEM, XPS, and water contact angle indicate a higher concentration of oxygen vacancies, higher aspect ratio and higher roughness factor for the needles than for the rods. Gas sensing tests towards hydrogen and carbon monoxide demonstrate reduced humidity-interference, and higher responses to the analytes for the needle-based systems compared to the rods. These results are attributed to the morphology of the sensitive materials, which not only affects the surface-area-to-volume-ratio of the films but also their surface chemistry. These findings indicate that a thorough optimization of morphology, structure and surface properties of gas sensitive metal oxides could allow for more reliable sensor operation in humid conditions.

Keywords

Zinc oxide Nanostructures Gas sensor Humidity

Authors

VALLEJOS VARGAS, S.; GRÁCIA, I.; PIZÚROVÁ, N.; FIGUERAS, E.; ČECHAL, J.; HUBÁLEK, J.; CANÉ, C.

Released

28. 8. 2019

ISBN

0925-4005

Periodical

Sensors and Actuators B: Chemical

Year of study

301

Number

1

State

Swiss Confederation

Pages from

127054

Pages to

127054

Pages count

9

URL

https://www.sciencedirect.com/science/article/pii/S0925400519312535?via%3Dihub

BibTex

@article{BUT159000,
  author="Stella {Vallejos Vargas} and Isabel {Grácia} and Naděžda {Pizúrová} and Eduard {Figueras} and Jan {Čechal} and Jaromír {Hubálek} and Carles {Cané}",
  title="Gas sensitive ZnO structures with reduced humidity-interference",
  journal="Sensors and Actuators B: Chemical",
  year="2019",
  volume="301",
  number="1",
  pages="127054--127054",
  doi="10.1016/j.snb.2019.127054",
  issn="0925-4005",
  url="https://www.sciencedirect.com/science/article/pii/S0925400519312535?via%3Dihub"
}