Quantifying dielectrophoretic collections of sub-micron particles on microelectrodes
Quantifying dielectrophoretic collections of sub-micron particles on microelectrodes
This paper presents a technique for measuring and quantifying the elelectrohporetic collection of sub-micron particles on planar microelectrode arrays. Fluorescence microscopy and video recording is used to measure the number of particles collecting on an electrode as a function of time for various experimental parameters, such as applied electrode voltage and frequency. Video images are processed using analytical methods that take advantage of the geometrical properties of the electrode array to extract quantitative information which is used to characterize the dielectric properties of particles. The time-dependent collection profiles can be chracterized by three parameters: the initial dielectrophoretic collection rate, the initial to pseudo-steady-state transition and the rise time. This method can be used asa general technique to characterize the dielectrophoretic properties of populations of sub-micron-scale particles.
non-uniform electric fields, particle concentration, dielectrophoretic collection, AC electrokinetcs, Fokker-Planck equation, dielectrophoresis, interdigitated electrode array
254-266
Bakewell, David
b9279588-4b41-4144-af91-ac46809a80cb
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
2004
Bakewell, David
b9279588-4b41-4144-af91-ac46809a80cb
Morgan, Hywel
de00d59f-a5a2-48c4-a99a-1d5dd7854174
Bakewell, David and Morgan, Hywel
(2004)
Quantifying dielectrophoretic collections of sub-micron particles on microelectrodes.
Measurement Science and Technology, 15, .
Abstract
This paper presents a technique for measuring and quantifying the elelectrohporetic collection of sub-micron particles on planar microelectrode arrays. Fluorescence microscopy and video recording is used to measure the number of particles collecting on an electrode as a function of time for various experimental parameters, such as applied electrode voltage and frequency. Video images are processed using analytical methods that take advantage of the geometrical properties of the electrode array to extract quantitative information which is used to characterize the dielectric properties of particles. The time-dependent collection profiles can be chracterized by three parameters: the initial dielectrophoretic collection rate, the initial to pseudo-steady-state transition and the rise time. This method can be used asa general technique to characterize the dielectrophoretic properties of populations of sub-micron-scale particles.
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More information
Published date: 2004
Keywords:
non-uniform electric fields, particle concentration, dielectrophoretic collection, AC electrokinetcs, Fokker-Planck equation, dielectrophoresis, interdigitated electrode array
Organisations:
Nanoelectronics and Nanotechnology
Identifiers
Local EPrints ID: 263175
URI: http://eprints.soton.ac.uk/id/eprint/263175
ISSN: 1361-6501
PURE UUID: 056fecd2-a743-47e3-8272-cff32a860842
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Date deposited: 13 Nov 2006
Last modified: 15 Mar 2024 03:18
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Author:
David Bakewell
Author:
Hywel Morgan
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