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Dealloying of Gold-Copper Alloy Nanowires: From Hillocks to Ring-Shaped Nanopores

Dealloying of Gold-Copper Alloy Nanowires: From Hillocks to Ring-Shaped Nanopores

Adrien Chauvin, Cyril Delacôte, Mohammed Boujtita, Benoit Angleraud, Junjun Ding, Chang-Hwan Choi, Pierre-Yves Tessier, Abdel-Aziz El Mel

Beilstein J Nanotechnol. 2016 Sep 29;7:1361-1367.

PMID: 27826510

Abstract:

We report on a novel fabrication approach of metal nanowires with complex surface. Taking advantage of nodular growth triggered by the presence of surface defects created intentionally on the substrate as well as the high tilt angle between the magnetron source axis and the normal to the substrate, metal nanowires containing hillocks emerging out of the surface can be created. The approach is demonstrated for several metals and alloys including gold, copper, silver, gold-copper and gold-silver. We demonstrate that applying an electrochemical dealloying process to the gold-copper alloy nanowire arrays allows for transforming the hillocks into ring-like shaped nanopores. The resulting porous gold nanowires exhibit a very high roughness and high specific surface making of them a promising candidate for the development of SERS-based sensors.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76621	Gold nanowires			Price

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