20.500.12556/DiRROS-20801 Effects of hydrogen dissociation during gas flooding on formation of metal hydride cluster ions in secondary ion mass spectrometry The application of hydrogen flooding was recently shown to be a simple and effective approach for improved layer differentiation and interface determination during secondary ion mass spectrometry (SIMS) depth profiling of thin films, as well as an approach with potential in the field of quantitative SIMS analyses. To study the effects of hydrogen further, flooding of H2 molecules was compared to reactions with atomic H on samples of pure metals and their alloys. H2 was introduced into the analytical chamber via a capillary, which was heated to approximately 2200 K to achieve dissociation. Dissociation of H2 up to 30% resulted in a significant increase in the intensity of the metal hydride cluster secondary ions originating from the metallic samples. Comparison of the time scales of possible processes provided insight into the mechanism of hydride cluster secondary ion formation. Cluster ions presumably form during the recombination of the atoms and molecules from the sample and atoms and molecules adsorbed from the gas. This process occurs on the surface or just above it during the sputtering process. These findings coincide with those of previous mechanistic and computational studies. hydrogen atmosphere molecule dissociation gas flooding cluster ions secondary ion mass spectrometry true false true MDPI Švica Angleški jezik Ni določen © 2024 by the authors. Neznano 2024-11-08 09:58:52 2024-11-08 09:58:52 2024-11-20 08:20:05 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Soavtorji: Sabina Markelj, Miran Mozetič, Rok Zaplotnik, Janez Kovač; Opis vira z dne 24. 10. 2024; str. 1-15 iss. 21, [article no.] 1687 Vol. 14 Nov. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2024-09-24 2024-10-18 2024-10-22 620.1/.2 2079-4991 10.3390/nano14211687 212778499 https://www.mdpi.com/2079-4991/14/21/1687 1 ae67d2d9-9daf-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29361 RAZ_Ekar_Jernej_2024.pdf RAZ_Ekar_Jernej_2024.pdf 1 3A4FC6DB2611BEE4E8F4B5C0E229FDE5 3179b8ed2b837878b52a8722cd9bf8aa3d354786a8fd41feedc5c9a0f09e4368 7e3aec4f-9db0-11ef-ba3f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=29362 Institut Jožef Stefan 0 0 0