Synthesis of nanocrystals by discharges in liquid nitrogen from Si-Sn sintered electrode
Kabbara, H. and Noël, C. and Ghanbaja, J. and Hussein, K. and Mariotti, D. and Švrcek, V. and Belmonte, T. (2015) Synthesis of nanocrystals by discharges in liquid nitrogen from Si-Sn sintered electrode. Scientific Reports, 5. 17477. ISSN 2045-2322 (https://doi.org/10.1038/srep17477)
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Abstract
The synthesis feasibility of silicon-tin nanocrystals by discharges in liquid nitrogen is studied using a Si-10 at % Sn sintered electrode. Time-resolved optical emission spectroscopy shows that silicon and tin melt almost simultaneously. The presence of both vapours does not lead to the synthesis of alloyed nanocrystals but to the synthesis of separate nanocrystals of silicon and tin with average sizes of 10 nm. These nanocrystals are transformed into amorphous silicon oxide (am-SiO2) and β-SnO2 by air oxidation, after evaporation of the liquid nitrogen. The synthesis of an am-Si 0.95 Sn 0.05 phase around large silicon crystals (∼500 nm) decorated by β-Sn spheroids is achieved if the current flowing through electrodes is high enough. When the sintered electrode is hit by powerful discharges, some grains are heated and tin diffuses in the large silicon crystals. Next, these grains are shelled and fall into the dielectric liquid.
ORCID iDs
Kabbara, H., Noël, C., Ghanbaja, J., Hussein, K., Mariotti, D. ORCID: https://orcid.org/0000-0003-1504-4383, Švrcek, V. and Belmonte, T.;-
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Item type: Article ID code: 90171 Dates: DateEvent1 December 2015PublishedSubjects: Technology > Chemical engineering Department: Faculty of Engineering > Design, Manufacture and Engineering Management Depositing user: Pure Administrator Date deposited: 07 Aug 2024 13:11 Last modified: 22 Sep 2024 01:26 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/90171