Co-sputtering of gold and copper onto liquids: a route towards the production of porous gold nanoparticles

Effective methods for the synthesis of high-purity nanoparticles (NPs) have been extensively studied for a few decades. Among others, cold plasma-based sputtering metals onto a liquid substrate appears to be a very promising technique for the synthesis of high-purity NPs. The process enables the pro...

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Bibliographic Details
Published in:Nanotechnology 2020-11, Vol.31 (45), p.455303
Main Authors: Chauvin, Adrien, Sergievskaya, Anastasiya, El Mel, Abdel-Aziz, Fucikova, Anna, Antunes Corrêa, Cinthia, Vesely, Jozef, Duverger-Nédellec, Elen, Cornil, David, Cornil, Jérôme, Tessier, Pierre-Yves, Dopita, Milan, Konstantinidis, Stephanos
Format: Article
Language:English
Subjects:
alloy
Condensed Matter
dealloying
liquid substrate
magnetron co-sputtering
Materials Science
nanoparticles
Physics
porous
sputtering onto liquids
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Summary:Effective methods for the synthesis of high-purity nanoparticles (NPs) have been extensively studied for a few decades. Among others, cold plasma-based sputtering metals onto a liquid substrate appears to be a very promising technique for the synthesis of high-purity NPs. The process enables the production of very small NPs without using any toxic reagents and complex chemical synthesis routes, and enables the synthesis of alloy NPs which can be the first step towards the formation of porous NPs. In this paper, the synthesis of gold-copper alloy NPs has been performed by co-sputtering gold and copper targets over pentaerythritol ethoxylate. The resulting solutions contain a mixture of gold, copper oxide, and alloy NPs having a radius of few angstroms. The annealing of these NPs, inside the solution, has been performed in order to increase their size and further induce the dealloying of the Au-Cu NPs. The resulting NPs exhibit either a nanoporous structure or are self-organized in an agglomerate of small NPs.
ISSN:0957-4484
1361-6528
DOI:10.1088/1361-6528/abaa75