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Title: Direct electroplating of copper on tantalum from ionic liquids in high vacuum: origin of the tantalum oxide layer
Authors: Schaltin, Stijn
D'Urzo, Lucia
Zhao, Qiang
Vantomme, Andre
Plank, Harald
Kothleitner, Gerald
Gspan, Christian
Binnemans, Koen
Fransaer, Jan # ×
Issue Date: 2012
Publisher: Royal Society of Chemistry
Series Title: Physical Chemistry Chemical Physics vol:14 issue:39 pages:13624-13629
Abstract: In this paper, it is shown that high vacuum conditions are not sufficient to completely remove water and oxygen from the ionic liquid 1-ethyl-3-methylimidazolium chloride. Complete removal of water demands heating above 150 1C under reduced pressure, as proven by Nuclear Reaction Analysis (NRA). Dissolved oxygen gas can only be removed by the use of an oxygen scavenger such as hydroquinone, despite the fact that calculations show that oxygen should be removed completely by the applied vacuum conditions. After applying a strict drying procedure and scavenging of molecular oxygen, it was possible to deposit copper directly on tantalum without the presence of an intervening oxide layer.
ISSN: 1463-9076
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Surface and Interface Engineered Materials
× corresponding author
# (joint) last author

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