TY - JOUR
T1 - Dealloying of gold-copper alloy nanowires
T2 - From hillocks to ring-shaped nanopores
AU - Chauvin, Adrien
AU - Delacôte, Cyril
AU - Boujtita, Mohammed
AU - Angleraud, Benoit
AU - Ding, Junjun
AU - Choi, Chang Hwan
AU - Tessier, Pierre Yves
AU - El Mel, Abdel Aziz
N1 - Publisher Copyright:
© 2016 Chauvin et al.
PY - 2016
Y1 - 2016
N2 - 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.
AB - 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.
KW - Copper
KW - Dealloying
KW - Gold
KW - Hillocks
KW - Nanoporous
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U2 - 10.3762/bjnano.7.127
DO - 10.3762/bjnano.7.127
M3 - Article
AN - SCOPUS:84993990861
VL - 7
SP - 1361
EP - 1367
JO - Beilstein Journal of Nanotechnology
JF - Beilstein Journal of Nanotechnology
IS - 1
ER -