Investigating plasma morphology at material boundaries under varying ambient pressures

Simple item page
dc.contributor.authorMohan, Meghacs
dc.contributor.authorProchazka, Davidcs
dc.contributor.authorYou, Yics
dc.contributor.authorRiedel, Jenscs
dc.contributor.authorGornushkin, Igorcs
dc.contributor.authorRočňáková, Ivanacs
dc.contributor.authorPapula, Martincs
dc.contributor.authorPořízka, Pavelcs
dc.contributor.authorKaiser, Jozefcs
dc.coverage.issue12cs
dc.coverage.volume295cs
dc.date.accessioned2025-08-07T06:57:07Z
dc.date.available2025-08-07T06:57:07Z
dc.date.issued2025-12-01cs
dc.description.abstractLaser-Induced Breakdown Spectroscopy (LIBS) is a widely used technique for elemental analysis. The analysis of the obtained LIBS spectra generally assumes plasma homogeneity. However, using focused laser beams for interrogation, LIBS probes materials on the microscale and is, thus, prone to artefacts from sample heterogeneities on the micrometre scale. An ablation at a material boundary of two matrices may result in a significant inhomogeneity in the plasma plume, which can severely impact the accuracy of quantitative analysis. Since this propagation of the surface morphology into the plasma plume is driven by the plasma expansion, its final impact is strongly pressure dependent. This study examines the influence of varying ambient pressures (7-1000 mbar) on plasma morphology, spectral characteristics, and key plasma properties such as electron number density at a well-defined Cu-Sn boundary, in comparison with the results obtained using homogeneous alloys. Several approaches of plasma imaging with bandpass filters, spectroscopy, and Radon transform-based 3D reconstruction were employed to analyse elemental distribution, signal-to-noise (SNR) and signal-to-background (SBR) ratios, as well as electron number densities. The 3D reconstructions revealed a pronounced plasma asymmetry for the ablation at the material boundary, in contrast to the near-axial symmetry observed for the ablation of homogeneous alloys. At lower pressures, this distinct elemental separation in plasma persisted, while higher pressures led to an increased collisional mixing and homogenization. SNR and SBR were consistently lower for ablation at the boundary compared to homogeneous samples. These findings highlight how boundary ablation contributes to plasma inhomogeneities in LIBS analysis of heterogeneous materials and emphasize the need to account for these effects when using LIBS for elemental mapping of fine heterogeneous structures.en
dc.formattextcs
dc.format.extent1-8cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationTALANTA. 2025, vol. 295, issue 12, p. 1-8.en
dc.identifier.doi10.1016/j.talanta.2025.128377cs
dc.identifier.issn1873-3573cs
dc.identifier.orcid0000-0001-6792-6500cs
dc.identifier.orcid0000-0003-3678-0064cs
dc.identifier.orcid0000-0002-8027-6394cs
dc.identifier.orcid0000-0002-8604-7365cs
dc.identifier.orcid0000-0002-7397-125Xcs
dc.identifier.other198209cs
dc.identifier.researcheridG-9453-2014cs
dc.identifier.researcheridAAB-7381-2021cs
dc.identifier.researcheridI-6603-2018cs
dc.identifier.researcheridG-9463-2014cs
dc.identifier.researcheridD-6800-2012cs
dc.identifier.scopus56875415300cs
dc.identifier.scopus57199646071cs
dc.identifier.scopus55312098800cs
dc.identifier.scopus7402184758cs
dc.identifier.urihttps://hdl.handle.net/11012/255411
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofTALANTAcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0039914025008677cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1873-3573/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectLaser-induced breakdown spectroscopyen
dc.subjectPlasma inhomogeneityen
dc.subjectPlasma tomographyen
dc.subjectRadon transformen
dc.subjectMaterial boundariesen
dc.subjectAmbient pressure effectsen
dc.titleInvestigating plasma morphology at material boundaries under varying ambient pressuresen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
eprints.grantNumberinfo:eu-repo/grantAgreement/GA0/GF/GF23-05186Kcs
sync.item.dbidVAV-198209en
sync.item.dbtypeVAVen
sync.item.insts2025.08.07 08:57:07en
sync.item.modts2025.08.07 08:33:55en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav fyzikálního inženýrstvícs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé instrumentace a metody pro charakterizace materiálůcs
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1s2.0S0039914025008677main.pdf
Size:
3.87 MB
Format:
Adobe Portable Document Format
Description:
file 1s2.0S0039914025008677main.pdf
Download
Collections
Pokročilé instrumentace a metody pro charakterizace materiálů
Ústav fyzikálního inženýrství