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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F20%3A00539242" target="_blank" >RIV/67985882:_____/20:00539242 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/20:10416619

Result on the web

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

DOI - Digital Object Identifier

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

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

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20201 - Electrical and electronic engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Sensors

ISSN

1424-8220

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

5602

UT code for WoS article

000586721500001

EID of the result in the Scopus database

2-s2.0-85091873688