Calculation of DEP and EWOD Forces for Application in Digital Microfluidics

Young, Patrick; Mohseni, Kamran

doi:10.1115/1.2956606

Cited by 31 publications

(22 citation statements)

References 25 publications

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“…Second, electrophoresis is simple and straightforward in principle, which provides high degree of freedom in chip design. Because we should understand complicated variation of surface tension and induced many theoretical [25][26][27] and numerical [28,29] researches to explain the underlying physics. However, the electrophoretic motion of a charged droplet can be easily predicted once the amount of charge of the droplet is known under the given electric field.…”

Section: J Immentioning

confidence: 99%

Next generation digital microfluidic technology: Electrophoresis of charged droplets

2015

Korean J. Chem. Eng.

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Contact charging of a conducting droplet in a dielectric medium is introduced as a novel and useful digital microfluidic technology as well as an interesting scientific phenomenon. The history of this phenomenon, starting from original observations to its interpretations and applications, is presented. The basic principle of the droplet contact charging is also presented. Several fundamental aspects of the droplet contact charging from view points of electrochemistry, surface science, electrocoalescence, and electrohydrodynamics are mentioned. Some promising results for future applications and potential features as a next generation digital microfluidic technology are discussed, especially for 3D organ printing. Finally, implications and significance of the proposed technology for chemical engineering community are discussed.

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Section: J Immentioning

confidence: 99%

Next generation digital microfluidic technology: Electrophoresis of charged droplets

2015

Korean J. Chem. Eng.

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“…However, exact modeling and simulations of droplet motion in EWOD is complicated [8]. A simplified model described in [9] is based on the assumption that droplet motion occurs as a result of the capillary line force generated when the electrode on which the droplet current resides is grounded while the adjacent electrode is simultaneously actuated.…”

Section: B Design and Configurationmentioning

confidence: 99%

Digital microfluidic operations on micro-electrode array architecture

Wang

Teng

Fan

2011

2011 6th IEEE International Conference on Nano/Micro Engineered and Molecular Systems

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As digital microfluidics-based biochips find more applications, their complexity is expected to increase significantly due to the trend of multiple and concurrent assays on the chip. There is a pressing need to deliver a top-down design methodology that the biochip designer can leverage the same level of computer aided design support as the semiconductor industry now does. Moreover, as microelectronics fabrication technology scaling and integrated device performance improving, it is expected that these microfluidic biochips will be integrated with microelectronic components in next-generation system-on-chip designs. This paper presents a novel electrowetting-on-dielectric (EWOD) based "micro-electrode array architecture" that fosters a development path for hierarchical top-down design approach for digital microfluidics, and also allows easy integration of microfluidics and microelectronics on a single chip. In addition, this novel architecture provides a number of advantages and flexibilities over the conventional digital microfluidics such as dynamic activations of variable-sized electrodes and dynamic manipulations of multiple droplets.

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“…along the entire channel (including the external fluid, as it also experiences electric forces). This basic DEP setup has been explored in detail previously by the authors 29 …”

Section: Applicationsmentioning

confidence: 99%

“…Direct numerical simulation 26 and numerical simulations using approximations of the electrostatic effect 13,27 in droplet morphology and dynamics under EWOD and DEP have been investigated previously. Investigations into the nature of forcing in EWOD 28 and into the forcing nature of DEP have also been accomplished 29 . The focus of this paper is to extend the work of Ref.…”

Section: Introductionmentioning

confidence: 98%

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Force Characterization of Dielectrophoresis in Droplet Transport

Young

Mohseni

2009

Annals of the New York Academy of Sciences

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Transporting microdroplets using electric fields can be accomplished with several mechanisms, the primary methods being dielectrophoresis (DEP) for electrically insulating liquids, and electrowetting on dielectric for conducting fluids. In both cases, an electric field is applied near the leading edge of the droplet using patterned electrodes, giving rise to an electrostatic pressure that induces droplet transport. This paper examines the nature of the force distribution for DEP-actuated droplets in several electrode configurations, calculated using a numerical method designed for handling jump conditions in the Poisson equation. The numerical method is described and verified by comparison with known analytical results. The net force acting upon a DEP droplet is investigated, with the effect of electrode configuration presented for several cases, demonstrating some beneficial aspects for engineering applications.

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Calculation of DEP and EWOD Forces for Application in Digital Microfluidics

Cited by 31 publications

References 25 publications

Next generation digital microfluidic technology: Electrophoresis of charged droplets

Next generation digital microfluidic technology: Electrophoresis of charged droplets

Digital microfluidic operations on micro-electrode array architecture

Force Characterization of Dielectrophoresis in Droplet Transport

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