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Volume 18
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10.3390/ma18194550
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Correlating Structural Properties with Catalytic Stability in Nanocrystalline La(Sr)CoO3 Thin Films Grown by Pulsed Electron Deposition (PED)

by
Lukasz Cieniek
1,*,
Dominik Grochala
2,
Tomasz Moskalewicz
1,
Agnieszka Kopia
1 and
Kazimierz Kowalski
1
1
Faculty of Metals Engineering and Industrial Computer Science, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland
2
Faculty of Computer Science, Electronics and Telecommunications, AGH University of Krakow, al. Mickiewicza 30, 30-059 Krakow, Poland
*
Author to whom correspondence should be addressed.
Materials 2025, 18(19), 4550; https://doi.org/10.3390/ma18194550
Submission received: 5 September 2025 / Revised: 24 September 2025 / Accepted: 29 September 2025 / Published: 30 September 2025
(This article belongs to the Section Thin Films and Interfaces)
Versions Notes

Abstract

This study investigates the structural, morphological, and gas-sensing properties of pure and strontium-doped lanthanum cobaltite (La1−xSrxCoO3) perovskite thin films obtained by Pulsed Electron Deposition (PED). This sustainable ablative technique successfully produced high-quality, dense, nanocrystalline films on Si and MgO substrates, demonstrating excellent stoichiometric transfer from the source targets. A comprehensive analysis using XRD, SEM, TEM, AFM, and XPS was conducted to characterize the films. The results show that Sr-doping significantly refines the microstructure, leading to smaller crystallites and a more uniform surface topography. Gas sensing measurements, performed in a temperature range of 100–450 °C, revealed that all films exhibit a characteristic p-type semiconductor response to nitrogen dioxide (NO2). The La0.8Sr0.2CoO3 composition, in particular, demonstrated the most promising performance, with enhanced sensitivity and excellent operational stability at temperatures up to 350 °C. These findings validate that PED is a reliable and precise method for fabricating complex oxide films and confirm that Sr-doped LaCoO3 is a highly promising material for developing high-temperature NO2 gas sensors.
Keywords: perovskite; thin films; Pulsed Electron Deposition (PED); channel spark discharge; gas sensor; NO2; LaCoO3; Sr doping perovskite; thin films; Pulsed Electron Deposition (PED); channel spark discharge; gas sensor; NO2; LaCoO3; Sr doping

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MDPI and ACS Style

Cieniek, L.; Grochala, D.; Moskalewicz, T.; Kopia, A.; Kowalski, K. Correlating Structural Properties with Catalytic Stability in Nanocrystalline La(Sr)CoO3 Thin Films Grown by Pulsed Electron Deposition (PED). Materials 2025, 18, 4550. https://doi.org/10.3390/ma18194550

AMA Style

Cieniek L, Grochala D, Moskalewicz T, Kopia A, Kowalski K. Correlating Structural Properties with Catalytic Stability in Nanocrystalline La(Sr)CoO3 Thin Films Grown by Pulsed Electron Deposition (PED). Materials. 2025; 18(19):4550. https://doi.org/10.3390/ma18194550

Chicago/Turabian Style

Cieniek, Lukasz, Dominik Grochala, Tomasz Moskalewicz, Agnieszka Kopia, and Kazimierz Kowalski. 2025. "Correlating Structural Properties with Catalytic Stability in Nanocrystalline La(Sr)CoO3 Thin Films Grown by Pulsed Electron Deposition (PED)" Materials 18, no. 19: 4550. https://doi.org/10.3390/ma18194550

APA Style

Cieniek, L., Grochala, D., Moskalewicz, T., Kopia, A., & Kowalski, K. (2025). Correlating Structural Properties with Catalytic Stability in Nanocrystalline La(Sr)CoO3 Thin Films Grown by Pulsed Electron Deposition (PED). Materials, 18(19), 4550. https://doi.org/10.3390/ma18194550

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