The University of Southampton
University of Southampton Institutional Repository

Electro-orientation and electrorotation of metal nanowires

Electro-orientation and electrorotation of metal nanowires
Electro-orientation and electrorotation of metal nanowires
The physical mechanisms responsible for the electrical orientation and electrical rotation of metal nanowires suspended in an electrolyte as a function of frequency of the applied ac electric field are examined theoretically and experimentally. The alignment of a nanowire in an ac field with a fixed direction is called electro-orientation. The induced constant rotation of a nanowire in a rotating electric field is called electrorotation. In both situations, the applied electric field interacts with the induced charge in the electrical double layer at the metal-electrolyte interface, causing rotation due to the torque on the induced dipole, and also from induced-charge electro-osmotic flow around the particle. First, we describe the dipole theory that describes electro-orientation and electrorotation of perfectly polarizable metal rods. Second, based on a slender approximation, an analytical theory that describes induced-charge electro-orientation and electrorotation of metal nanowires is provided. Finally, experimental measurements of the electro-orientation and electrorotation of metal nanowires are presented and compared with theory, providing a comprehensive study of the relative importance between induced-dipole rotation and induced-charge electro-osmotic rotation.
1539-3755
63018
Arcenegui, Juan J
a27fdd5c-f9ba-4a49-973e-c70c55940456
García-Sánchez, Pablo
11cec08e-0384-4ef6-a1b3-183c9b32c4ea
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559
Arcenegui, Juan J
a27fdd5c-f9ba-4a49-973e-c70c55940456
García-Sánchez, Pablo
11cec08e-0384-4ef6-a1b3-183c9b32c4ea
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Ramos, Antonio
511ab594-f312-45ce-b7ff-ef348fd9b559

Arcenegui, Juan J, García-Sánchez, Pablo, Morgan, Hywel and Ramos, Antonio (2013) Electro-orientation and electrorotation of metal nanowires. Physical Review E, 88 (6), 63018. (doi:10.1103/PhysRevE.88.063018). (PMID:24483568)

Record type: Article

Abstract

The physical mechanisms responsible for the electrical orientation and electrical rotation of metal nanowires suspended in an electrolyte as a function of frequency of the applied ac electric field are examined theoretically and experimentally. The alignment of a nanowire in an ac field with a fixed direction is called electro-orientation. The induced constant rotation of a nanowire in a rotating electric field is called electrorotation. In both situations, the applied electric field interacts with the induced charge in the electrical double layer at the metal-electrolyte interface, causing rotation due to the torque on the induced dipole, and also from induced-charge electro-osmotic flow around the particle. First, we describe the dipole theory that describes electro-orientation and electrorotation of perfectly polarizable metal rods. Second, based on a slender approximation, an analytical theory that describes induced-charge electro-orientation and electrorotation of metal nanowires is provided. Finally, experimental measurements of the electro-orientation and electrorotation of metal nanowires are presented and compared with theory, providing a comprehensive study of the relative importance between induced-dipole rotation and induced-charge electro-osmotic rotation.

Other
PhysRevE.88.063018 - Version of Record
Available under License Other.
Download (1MB)

More information

Published date: 27 December 2013
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 368165
URI: http://eprints.soton.ac.uk/id/eprint/368165
ISSN: 1539-3755
PURE UUID: 75213cb1-8e86-45f1-81a4-f3af5a7f6ee9
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676

Catalogue record

Date deposited: 19 Aug 2014 12:04
Last modified: 15 Mar 2024 03:18

Export record

Altmetrics

Contributors

Author: Juan J Arcenegui
Author: Pablo García-Sánchez
Author: Hywel Morgan ORCID iD
Author: Antonio Ramos

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×