Investigation of gas sensing mechanism of SnO2 based chemiresistor using near ambient pressure XPS
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F18%3A43916555" target="_blank" >RIV/60461373:22340/18:43916555 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/18:00496392 RIV/67985891:_____/18:00496392 RIV/00216208:11320/18:10389463
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0039602818305612?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0039602818305612?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.susc.2018.08.003" target="_blank" >10.1016/j.susc.2018.08.003</a>
Alternative languages
Result language
angličtina
Original language name
Investigation of gas sensing mechanism of SnO2 based chemiresistor using near ambient pressure XPS
Original language description
In this article, we present the results of an investigation into chemical processes which take place at the surface of SnO2-based chemiresistor in various atmospheres (1 mbar of argon, 1 mbar of oxygen, 0.1 mbar of ethanol, 1 mbar of oxygen + 0.1 mbar of ethanol mixture) at common working temperatures (450 and 573 K). The key method for nanoscale analysis was the Near Ambient Pressure X-ray Photoelectron Spectroscopy. In parallel the resistance and DC-responses of SnO2 layer were in-situ monitored providing information about macroscale processes during gas sensing. The change in the sensor resistance after exposure to the ethanol-containing atmospheres together with the disappearance of the band bending effect and observation of different carbonaceous groups including ethoxy groups and acetaldehyde molecules on the sensor surface in the XPS spectra supported the theory of chemical interaction of ethanol with the chemisorbed oxygen. The NAP-XPS spectra also showed that the nanostructured tin oxide is partially reduced even after being exposed to pure oxygen at 573 K. Exposing this surface to the mixture of O2/EtOH did not significantly increase the surface reduction probably due to slow kinetics of the ethanol reduction process and fast kinetics of the oxygen re-oxidation process. However, it was demonstrated that the surface of sensor is slowly getting contaminated by carbon. © 2018 Elsevier B.V.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Surface Science
ISSN
0039-6028
e-ISSN
—
Volume of the periodical
677
Issue of the periodical within the volume
November 2018
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
284-290
UT code for WoS article
000447478700038
EID of the result in the Scopus database
2-s2.0-85051623375