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Self-assembly of metal nanowires induced by alternating current electric fields

Self-assembly of metal nanowires induced by alternating current electric fields
Self-assembly of metal nanowires induced by alternating current electric fields
We describe the reversible assembly of an aqueous suspension of metal nanowires into two different 2-dimensional stable configurations. The assembly is induced by an AC electric field of magnitude around 10?kV/m. It is known that single metal nanowires orientate parallel to the electric field for all values of applied frequency, according to two different mechanisms depending on the frequency. These different mechanisms also govern the mutual interaction between nanowires, which leads to directed-assembly into distinctive structures, the shape of which depends on the frequency of the applied field. We show that for frequencies higher than the typical frequency for charging the electrical double layer at the metal-electrolyte interface, dipole-dipole interaction leads to the formation of chains of nanowires. For lower frequencies, the nanowires form wavy bands perpendicular to the electric field direction. This behavior appears to be driven by the electroosmotic flow induced on the metal surface of the nanowires. Remarkably, no similar structures have been reported in previous studies of nanowires.
0003-6951
1-4
Garcia-Sanchez, Pablo
9f2b8e4f-0c15-4cff-9f3b-91ce213c4ca5
Arcenegui, Juan
6ef35800-1017-4e3c-afab-23d56ae41d4a
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Garcia-Sanchez, Pablo
9f2b8e4f-0c15-4cff-9f3b-91ce213c4ca5
Arcenegui, Juan
6ef35800-1017-4e3c-afab-23d56ae41d4a
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559

Garcia-Sanchez, Pablo, Arcenegui, Juan, Morgan, Hywel and Ramos, Antonio (2015) Self-assembly of metal nanowires induced by alternating current electric fields. Applied Physics Letters, 106 (23110), 1-4. (doi:10.1063/1.4905924).

Record type: Article

Abstract

We describe the reversible assembly of an aqueous suspension of metal nanowires into two different 2-dimensional stable configurations. The assembly is induced by an AC electric field of magnitude around 10?kV/m. It is known that single metal nanowires orientate parallel to the electric field for all values of applied frequency, according to two different mechanisms depending on the frequency. These different mechanisms also govern the mutual interaction between nanowires, which leads to directed-assembly into distinctive structures, the shape of which depends on the frequency of the applied field. We show that for frequencies higher than the typical frequency for charging the electrical double layer at the metal-electrolyte interface, dipole-dipole interaction leads to the formation of chains of nanowires. For lower frequencies, the nanowires form wavy bands perpendicular to the electric field direction. This behavior appears to be driven by the electroosmotic flow induced on the metal surface of the nanowires. Remarkably, no similar structures have been reported in previous studies of nanowires.

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Accepted/In Press date: 2 January 2014
Published date: 13 January 2015
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 400930
URI: https://eprints.soton.ac.uk/id/eprint/400930
ISSN: 0003-6951
PURE UUID: 3a47dc27-5cc0-4f68-9cbb-dbd489e453fe
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676

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Date deposited: 30 Sep 2016 08:59
Last modified: 20 Jul 2019 00:59

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Contributors

Author: Pablo Garcia-Sanchez
Author: Juan Arcenegui
Author: Hywel Morgan ORCID iD
Author: Antonio Ramos

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