https://doi.org/10.1140/epjd/s10053-023-00721-6
Regular Article – Atomic and Molecular Collisions
Dissociative electron attachment and dissociative ionization of CF3AuCNC(CH3)3, a potential FEBID precursor for gold deposition
1
Science Institute and Department of Chemistry, University of Iceland, Dunhagi 3, 107, Reykjavík, Iceland
2
Department of Chemistry, University of Florida, 32611-7200, Gainesville, FL, USA
Received:
10
May
2023
Accepted:
27
June
2023
Published online:
16
August
2023
Appreciable effort is currently committed to designing suitable organometallic precursors for fabrication of metallic nanostructures with focused electron beam induced deposition (FEBID)—a direct write method with high potential for 3D patterning. In this context, the initial interaction of the potential precursor with low energy electrons is critical and the extent of electron-induced ligand loss determines the composition of the resulting deposits. Specifically of interest are gold-containing precursors, as the optoelectronic properties of gold provide potential for a variety of plasmonic and light enhancing applications of 3D nanostructures. Here, we study low energy electron-induced fragmentation of CF3AuCNC(CH3)3 through dissociative ionization (DI) and dissociative electron attachment (DEA) in the gas phase under single collision conditions and under conditions where collisional stabilization is provided. We further compare the fragmentation patterns observed under these conditions with the composition of deposits formed from this precursor under FEBID conditions. In DI, a significant difference in relative intensities is found under single collision conditions as compared to conditions where collisional stabilization is provided, while under both these conditions, only the same DEA channel is open. Comparison with the composition of deposits formed under FEBID conditions shows that the initial electron-induced fragmentation processes are not directly reflected in the deposit’s composition. Rather, we expect these to determine the initial composition of immobilized fragments, while the final composition of the deposit is determined by electron-induced secondary and tertiary reactions caused by further irradiation after immobilization.
Reminiscence of good times More than one article could be written about Michael Brunger, the Hippy, and they would all be a testimony of a memorable man, a good scientist and more importantly a humorous, tolerant, and a very good person, moreover, they would be fun to read. However, in his spirit, I'm going to keep it short.
I was so fortunate to enjoy Michael’s friendship, and his support and collaboration in science, in science administration (politics :-) and in personal matters. He also became dear to my children, when he generously hosted me and my family in Adelaide during my sabbatical in 2012, an experience we still talk about at the dinner table, now more than 10 years later. In one of our more personal conversations about lost ones, Michal said „...as long as you are still talked about, you are not gone.“. With all the opportunities the Hippy has provided for reminiscence of good times, there is no doubt that many will talk kindly and of respect of him long time from now.
Oddur
T.I.: Electron and Positron Interactions and Their Applications-a tribute to Professor Michael Brunger. Guest editors: Márcio Henrique Franco Bettega, Stephen Buckman, Dragana Maric, Sylwia Ptasinska, Ron White.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
