Quantifying dielectrophoretic collections of sub-micron particles on microelectrodes

Bakewell, David and Morgan, Hywel (2004) Quantifying dielectrophoretic collections of sub-micron particles on microelectrodes. Measurement Science and Technology, 15, 254-266.


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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.

Item Type: Article
Keywords: non-uniform electric fields, particle concentration, dielectrophoretic collection, AC electrokinetcs, Fokker-Planck equation, dielectrophoresis, interdigitated electrode array
Divisions : Faculty of Physical Sciences and Engineering > Electronics and Computer Science > NANO
ePrint ID: 263175
Accepted Date and Publication Date:
Date Deposited: 13 Nov 2006
Last Modified: 31 Mar 2016 14:07
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/263175

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