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
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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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
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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