Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS

T. de los Arcos, C. Weinberger, F. Zysk, V. Raj Damerla, S. Kollmann, P. Vieth, M. Tiemann, T. Kühne, G. Grundmeier, Applied Surface Science 604 (2022).

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Journal Article | Published | English
Author
de los Arcos, Teresa; Weinberger, ChristianLibreCat; Zysk, FrederikLibreCat; Raj Damerla, Varun; Kollmann, Sabrina; Vieth, Pascal; Tiemann, MichaelLibreCat ; Kühne, ThomasLibreCat; Grundmeier, GuidoLibreCat
Abstract
Near ambient pressure XPS in nitrogen atmosphere was utilized to investigate gas-solid interactions within porous SiO2 films ranging from 30 to 75 nm thickness. The films were differentiated in terms of porosity and roughness. The XPS N1s core levels of the N2 gas in presence of the SiO2 samples showed variations in width, binding energy and line shape. The width correlated with the surface charge induced in the dielectric films upon X-ray irradiation. The observed different binding energies observed for the N1s peak can only partly be associated with intrinsic work function differences between the samples, opening the possibility that the effect of physisorption at room temperature could be detected by a shift in the measured binding energy. However, the signals also show an increasing asymmetry with rising surface charge. This might be associated with the formation of vertical electrical gradients within the dielectric porous thin films, which complicates the assignment of binding energy positions to specific surface-related effects. With the support of Monte Carlo and first principles density functional theory calculations, the observed shifts were discussed in terms of the possible formation of transitory dipoles upon N2 physisorption within the porous SiO2 films.
Publishing Year
Journal Title
Applied Surface Science
Volume
604
Article Number
154525
ISSN
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de los Arcos T, Weinberger C, Zysk F, et al. Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS. Applied Surface Science. 2022;604. doi:10.1016/j.apsusc.2022.154525
de los Arcos, T., Weinberger, C., Zysk, F., Raj Damerla, V., Kollmann, S., Vieth, P., Tiemann, M., Kühne, T., & Grundmeier, G. (2022). Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS. Applied Surface Science, 604, Article 154525. https://doi.org/10.1016/j.apsusc.2022.154525
@article{de los Arcos_Weinberger_Zysk_Raj Damerla_Kollmann_Vieth_Tiemann_Kühne_Grundmeier_2022, title={Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS}, volume={604}, DOI={10.1016/j.apsusc.2022.154525}, number={154525}, journal={Applied Surface Science}, publisher={Elsevier BV}, author={de los Arcos, Teresa and Weinberger, Christian and Zysk, Frederik and Raj Damerla, Varun and Kollmann, Sabrina and Vieth, Pascal and Tiemann, Michael and Kühne, Thomas and Grundmeier, Guido}, year={2022} }
Arcos, Teresa de los, Christian Weinberger, Frederik Zysk, Varun Raj Damerla, Sabrina Kollmann, Pascal Vieth, Michael Tiemann, Thomas Kühne, and Guido Grundmeier. “Challenges in the Interpretation of Gas Core Levels for the Determination of Gas-Solid Interactions within Dielectric Porous Films by Ambient Pressure XPS.” Applied Surface Science 604 (2022). https://doi.org/10.1016/j.apsusc.2022.154525.
T. de los Arcos et al., “Challenges in the interpretation of gas core levels for the determination of gas-solid interactions within dielectric porous films by ambient pressure XPS,” Applied Surface Science, vol. 604, Art. no. 154525, 2022, doi: 10.1016/j.apsusc.2022.154525.
de los Arcos, Teresa, et al. “Challenges in the Interpretation of Gas Core Levels for the Determination of Gas-Solid Interactions within Dielectric Porous Films by Ambient Pressure XPS.” Applied Surface Science, vol. 604, 154525, Elsevier BV, 2022, doi:10.1016/j.apsusc.2022.154525.

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