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New Insights towards High-Temperature Ethanol-Sensing Mechanism of ZnO-Based Chemiresistors

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F20%3A43920596" target="_blank" >RIV/60461373:22340/20:43920596 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.mdpi.com/1424-8220/20/19/5602" target="_blank" >https://www.mdpi.com/1424-8220/20/19/5602</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.3390/s20195602" target="_blank" >10.3390/s20195602</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    New Insights towards High-Temperature Ethanol-Sensing Mechanism of ZnO-Based Chemiresistors

  • Original language description

    In this work, we investigate ethanol (EtOH)-sensing mechanisms of a ZnO nanorod (NRs)-based chemiresistor using a near-ambient-pressure X-ray photoelectron spectroscopy (NAP-XPS). First, the ZnO NRs-based sensor was constructed, showing good performance on interaction with 100 ppm of EtOH in the ambient air at 327 degrees C. Then, the same ZnO NRs film was investigated by NAP-XPS in the presence of 1 mbar oxygen, simulating the ambient air atmosphere and O-2/EtOH mixture at the same temperature. The partial pressure of EtOH was 0.1 mbar, which corresponded to the partial pressure of 100 ppm of analytes in the ambient air. To better understand the EtOH-sensing mechanism, the NAP-XPS spectra were also studied on exposure to O-2/EtOH/H2O and O-2/MeCHO (MeCHO = acetaldehyde) mixtures. Our results revealed that the reaction of EtOH with chemisorbed oxygen on the surface of ZnO NRs follows the acetaldehyde pathway. It was also demonstrated that, during the sensing process, the surface becomes contaminated by different products of MeCHO decomposition, which decreases dc-sensor performance. However, the ac performance does not seem to be affected by this phenomenon.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    21001 - Nano-materials (production and properties)

Result continuities

  • Project

    <a href="/en/project/GA19-02804S" target="_blank" >GA19-02804S: Nanostructured heterojunctions for chemiresistors</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Sensors

  • ISSN

    1424-3210

  • e-ISSN

  • Volume of the periodical

    20

  • Issue of the periodical within the volume

    19

  • Country of publishing house

    CH - SWITZERLAND

  • Number of pages

    14

  • Pages from-to

    1-14

  • UT code for WoS article

    000586721500001

  • EID of the result in the Scopus database

    2-s2.0-85091873688