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Electrokinetics of Particles and Fluids

Electrokinetics of Particles and Fluids
Electrokinetics of Particles and Fluids
Microfluidic systems offer integration of multiple functions on a single platform. Automated or remote manipulation and analysis of particles and fluids is a key element in micro-technologies and Lab-on-a-Chip. In most Lab-on-a-Chip systems, samples are suspended in an aqueous electrolyte: a conducting fluid medium. The reduction in size of these systems leads to a number of changes in system behaviour, for example the behaviour of fluid is dominated by viscosity. Also it is reasonable easy to generate very large electric fields and field gradients in micro-systems using quite low voltages. External pumps are often used to move fluid, but there is a growing interest in using electrokinetics to move liquids and solid particles within micro-chips using integrated electrodes. Electrokinetics is particularly attractive on the scale of micro-fluidics systems. The forces are easy to control by designing optimum electrode structures and choice of field and frequency. In this chapter we review the theory of electrokinetics in DC and AC fields, and its application to the manipulation of particles, including dielectrophoresis. We then discuss the theories and application of electrohydrodynamic effects in microsystems, focusing on electroosmosis (in DC and AC fields) and electrothermal effects in AC field. We finish with a short discussion of scaling effects.
Oxford University Press
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Green, Nicolas
d9b47269-c426-41fd-a41d-5f4579faa581
Sun, Tao
b2f8e932-a7e6-4fe7-94dd-5c4ce725eacb
Ho, Chih-Ming
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Green, Nicolas
d9b47269-c426-41fd-a41d-5f4579faa581
Sun, Tao
b2f8e932-a7e6-4fe7-94dd-5c4ce725eacb
Ho, Chih-Ming

Morgan, Hywel, Green, Nicolas and Sun, Tao (2008) Electrokinetics of Particles and Fluids. In, Ho, Chih-Ming (ed.) Microtechnology and Nanotechnology in Biomedical Applications. Oxford University Press. (Submitted)

Record type: Book Section

Abstract

Microfluidic systems offer integration of multiple functions on a single platform. Automated or remote manipulation and analysis of particles and fluids is a key element in micro-technologies and Lab-on-a-Chip. In most Lab-on-a-Chip systems, samples are suspended in an aqueous electrolyte: a conducting fluid medium. The reduction in size of these systems leads to a number of changes in system behaviour, for example the behaviour of fluid is dominated by viscosity. Also it is reasonable easy to generate very large electric fields and field gradients in micro-systems using quite low voltages. External pumps are often used to move fluid, but there is a growing interest in using electrokinetics to move liquids and solid particles within micro-chips using integrated electrodes. Electrokinetics is particularly attractive on the scale of micro-fluidics systems. The forces are easy to control by designing optimum electrode structures and choice of field and frequency. In this chapter we review the theory of electrokinetics in DC and AC fields, and its application to the manipulation of particles, including dielectrophoresis. We then discuss the theories and application of electrohydrodynamic effects in microsystems, focusing on electroosmosis (in DC and AC fields) and electrothermal effects in AC field. We finish with a short discussion of scaling effects.

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More information

Submitted date: 2008
Additional Information: Chapter: V
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 265309
URI: https://eprints.soton.ac.uk/id/eprint/265309
PURE UUID: 1708ae2c-2b00-4c7d-ba4e-5440233b5195
ORCID for Hywel Morgan: ORCID iD orcid.org/0000-0003-4850-5676
ORCID for Nicolas Green: ORCID iD orcid.org/0000-0001-9230-4455

Catalogue record

Date deposited: 11 Mar 2008 12:17
Last modified: 06 Jun 2018 12:45

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Contributors

Author: Hywel Morgan ORCID iD
Author: Nicolas Green ORCID iD
Author: Tao Sun
Editor: Chih-Ming Ho

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