Modeling of dielectrophoretic particle motion: Point particle versus finite‐sized particle

Çetin, Barbaros; Öner, S. Doğan; Baranoğlu, Besim

doi:10.1002/elps.201600461

Cited by 22 publications

(26 citation statements)

References 29 publications

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“…16D). A similar approach was also employed by Cetin et al [217] to model the dielectrophoretic particle motion in a constriction microchannel. Figure 17A shows a schematic analysis of the particle motion in the electroosmotic flow through one period of a serpentine microchannel, where the background displays the electric field contour and lines.…”

Section: Microchannels With a Single Bendmentioning

confidence: 98%

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Recent advances in direct current electrokinetic manipulation of particles for microfluidic applications

Xuan

2019

Electrophoresis

101

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Microfluidic devices have been extensively used to achieve precise transport and placement of a variety of particles for numerous applications. A range of force fields have thus far been demonstrated to control the motion of particles in microchannels. Among them, electric field‐driven particle manipulation may be the most popular and versatile technique because of its general applicability and adaptability as well as the ease of operation and integration into lab‐on‐a‐chip systems. This article is aimed to review the recent advances in direct current (DC) (and as well DC‐biased alternating current) electrokinetic manipulation of particles for microfluidic applications. The electric voltages are applied through electrodes that are positioned into the distant channel‐end reservoirs for a concurrent transport of the suspending fluid and manipulation of the suspended particles. The focus of this review is upon the cross‐stream nonlinear electrokinetic motions of particles in the linear electroosmotic flow of fluids, which enable the diverse control of particle transport in microchannels via the wall‐induced electrical lift and/or the insulating structure‐induced dielectrophoretic force.

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Section: Microchannels With a Single Bendmentioning

confidence: 98%

“…A similar approach was also employed by Cetin et al. to model the dielectrophoretic particle motion in a constriction microchannel.…”

Section: Curved Microchannelsmentioning

confidence: 99%

Recent advances in direct current electrokinetic manipulation of particles for microfluidic applications

Xuan

2019

Electrophoresis

101

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“…If the particle is flowing, the overall dielectrophoretic displacement depends on the time interval in which the particle experiences the DEP force, which is inversely related to particle velocity. Accordingly, the trajectory of the particle is a result of the interaction of the particle with the electrical potential field and the flow field .…”

Section: Operating Principle and Basic Theorymentioning

confidence: 99%

A simple electrical approach to monitor dielectrophoretic focusing of particles flowing in a microchannel

et al. 2019

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This paper reports an impedance‐based system for the quantitative assessment of dielectrophoretic (DEP) focusing of single particles flowing in a microchannel. Particle lateral positions are detected in two electrical sensing zones placed before and after a DEP‐focusing region, respectively. In each sensing zone, particle lateral positions are estimated using the unbalance between the opposite pulses of a differential current signal obtained with a straightforward coplanar electrode configuration. The system is used to monitor the focusing of polystyrene beads of 7 or 10 μm diameter, under various conditions of DEP field intensities and flow rates that produce different degrees of focusing. This electrical approach represents a simple and valuable alternative to optical methods for monitoring of particle focusing systems.

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“…DEP force DEP force is described as a force that is applied to a dielectric particle in a non-uniform electric eld. We can de ne DEP force exerted on a spherical particle as follows [39]:…”

Section: Introductionmentioning

confidence: 99%

Numerical study of insulation structure characteristics and arrangement effects on cell trapping using alternative current insulating based dielectrophoresis

2019

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Insulator-based dielectrophoresis is a recently developed technique in which insulating posts are used to produce non-uniformity in the electric eld in a microchannel. This study presents the e ects of insulating posts' geometry and arrangement on the trapping e ciency of red blood cells in an alternating current-insulator-based dielectrophoresis system. Microchannels containing square, circular, and diamond-shaped posts with particles under the in uence of positive dielectrophoresis force and uid ow were considered in this study. The nite element method was used to compute the velocity of the ow and electric eld. The numerical method was veri ed by comparing the numerical results with experimental data. Two distinct criteria for examining particle trapping for distinct shapes and arrangements of insulating posts were introduced. Particle tracing simulation was implemented to observe particle trapping and compare the trapping performance of systems with distinct posts. As shown in the results for the system with circular and square posts, insulators should be narrowed to improve particle trapping, while the diamond post should be widened to increase the trapping e ciency. In addition, the particle tracking results showed that the microchannel with square posts was more e cient in particle trapping.

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Modeling of dielectrophoretic particle motion: Point particle versus finite‐sized particle

Cited by 22 publications

References 29 publications

Recent advances in direct current electrokinetic manipulation of particles for microfluidic applications

Recent advances in direct current electrokinetic manipulation of particles for microfluidic applications

A simple electrical approach to monitor dielectrophoretic focusing of particles flowing in a microchannel

Numerical study of insulation structure characteristics and arrangement effects on cell trapping using alternative current insulating based dielectrophoresis

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