Synthesis of nanocrystals by discharges ...
Document type :
Article dans une revue scientifique
DOI :
PMID :
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Title :
Synthesis of nanocrystals by discharges in liquid nitrogen from Si-Sn sintered electrode
Author(s) :
Kabbara, H [Auteur]
Noel, Christian [Auteur]
Lille Inflammation Research International Center - U 995 [LIRIC]
Ghanbaja, J [Auteur]
Hussein, K [Auteur]
Mariotti, D [Auteur]
Svrcek, V [Auteur]
Belmonte, T [Auteur]
Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL]
Noel, Christian [Auteur]
Lille Inflammation Research International Center - U 995 [LIRIC]
Ghanbaja, J [Auteur]
Hussein, K [Auteur]
Mariotti, D [Auteur]
Svrcek, V [Auteur]
Belmonte, T [Auteur]
Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 [CRIStAL]
Journal title :
Scientific Reports
Abbreviated title :
Sci Rep
Volume number :
5
Publication date :
2015-12-01
ISSN :
2045-2322
2045-2322
2045-2322
HAL domain(s) :
Sciences du Vivant [q-bio]
English abstract : [en]
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 ...
Show more >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 beta-SnO2 by air oxidation, after evaporation of the liquid nitrogen. The synthesis of an am-Si0.95Sn0.05 phase around large silicon crystals (~500 nm) decorated by beta-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.Show less >
Show more >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 beta-SnO2 by air oxidation, after evaporation of the liquid nitrogen. The synthesis of an am-Si0.95Sn0.05 phase around large silicon crystals (~500 nm) decorated by beta-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.Show less >
Language :
Anglais
Audience :
Internationale
Popular science :
Non
Administrative institution(s) :
Inserm
Université de Lille
CHU Lille
Université de Lille
CHU Lille
Research team(s) :
Immunity, inflammation and fibrsis in auto and allo-reactivity
Submission date :
2019-03-01T14:17:21Z