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Higher order dielectrophoretic force characterisation of non-spherical particles

Higher order dielectrophoretic force characterisation of non-spherical particles
Higher order dielectrophoretic force characterisation of non-spherical particles
A numerical method is presented for determination of higher-order dielectrophoretic forces on non-spherical particles. The method is applied to ellipsoidal particles of different dimensions subjected to electric fields with different degrees of non-uniformity. The results are compared against net force calculations using the Maxwell stress tensor method. The contribution from higher-order forces is shown to exceed the dielectrophoretic force based only on the dipole approximation when particle dimensions are comparable to the length scale of electric field non-uniformity. It is also shown that individual contributions from quadrupolar and octupolar dielectrophoretic forces strongly depend on particle aspect ratio.
1742-6588
Nili, Hossein
ced86ec9-18eb-4305-9b62-67a97589e768
Sun, Tao
b2f8e932-a7e6-4fe7-94dd-5c4ce725eacb
Green, Nicolas
d9b47269-c426-41fd-a41d-5f4579faa581
Nili, Hossein
ced86ec9-18eb-4305-9b62-67a97589e768
Sun, Tao
b2f8e932-a7e6-4fe7-94dd-5c4ce725eacb
Green, Nicolas
d9b47269-c426-41fd-a41d-5f4579faa581

Nili, Hossein, Sun, Tao and Green, Nicolas (2011) Higher order dielectrophoretic force characterisation of non-spherical particles. Journal of Physics: Conference Series, 301 (12061).

Record type: Article

Abstract

A numerical method is presented for determination of higher-order dielectrophoretic forces on non-spherical particles. The method is applied to ellipsoidal particles of different dimensions subjected to electric fields with different degrees of non-uniformity. The results are compared against net force calculations using the Maxwell stress tensor method. The contribution from higher-order forces is shown to exceed the dielectrophoretic force based only on the dipole approximation when particle dimensions are comparable to the length scale of electric field non-uniformity. It is also shown that individual contributions from quadrupolar and octupolar dielectrophoretic forces strongly depend on particle aspect ratio.

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Published date: June 2011
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 272515
URI: https://eprints.soton.ac.uk/id/eprint/272515
ISSN: 1742-6588
PURE UUID: a2983051-1fb3-4325-8bd1-06cfb01a3087
ORCID for Nicolas Green: ORCID iD orcid.org/0000-0001-9230-4455

Catalogue record

Date deposited: 24 Jun 2011 17:33
Last modified: 18 Jul 2019 00:55

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