Programmable droplet actuating platform using liquid dielectrophoresis

Frozanpoor, Iman; Cooke, Mary; Rácz, Zoltán; Bossons, Ian; Ambukan, Vibin; Wood, David; Gallant, Andrew J.; Balocco, Claudio

doi:10.1088/1361-6439/abf032

Cited by 16 publications

(10 citation statements)

References 33 publications

(43 reference statements)

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“…The controlled transport of electrically charged liquid droplets has important applications in controlled drug delivery and in the separation of micro/macro molecules [73][74][75][76][77]. Charged liquid droplets suspended in an immiscible fluid can be manipulated employing EFs [78].…”

Section: Dropletsmentioning

confidence: 99%

“…(F) Adapted from Ref. [75], open access article distributed under the Creative Commons Attribution (CC BY) License (2021).…”

Section: Dropletsmentioning

confidence: 99%

“…More recently, another interesting DEP‐based actuation and manipulation of droplets to control their wetting behavior were reported by Frozanpoor et al. [75]. They developed a droplet‐actuating platform by exploiting high EFs at the droplet solid–liquid interface using L‐DEP.…”

Section: Dropletsmentioning

confidence: 99%

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Electropatterning—Contemporary developments for selective particle arrangements employing electrokinetics

et al. 2023

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The selective positioning and arrangement of distinct types of multiscale particles can be used in numerous applications in microfluidics, including integrated circuits, sensors and biochips. Electrokinetic (EK) techniques offer an extensive range of options for label‐free manipulation and patterning of colloidal particles by exploiting the intrinsic electrical properties of the target of interest. EK‐based techniques have been widely implemented in many recent studies, and various methodologies and microfluidic device designs have been developed to achieve patterning two‐ and three‐dimensional (3D) patterned structures. This review provides an overview of the progress in electropatterning research during the last 5 years in the microfluidics arena. This article discusses the advances in the electropatterning of colloids, droplets, synthetic particles, cells, and gels. Each subsection analyzes the manipulation of the particles of interest via EK techniques such as electrophoresis and dielectrophoresis. The conclusions summarize recent advances and provide an outlook on the future of electropatterning in various fields of application, especially those with 3D arrangements as their end goal.

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Section: Dropletsmentioning

confidence: 99%

“…(F) Adapted from Ref. [75], open access article distributed under the Creative Commons Attribution (CC BY) License (2021).…”

Section: Dropletsmentioning

confidence: 99%

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Electropatterning—Contemporary developments for selective particle arrangements employing electrokinetics

et al. 2023

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“…The control of liquid deformation and motion is a key technology in modern chemistry, biology, and medicine. , Especially in the fabrication of microelectromechanical systems (MEMS) and microelectronic devices, some polymer liquids are widely used for multipart assembly, encapsulation, etc. For example, the formation of dielectric fluid can be transferred to produce a polydimethylsiloxane (PDMS) stamp, which is a key element of soft lithography .…”

Section: Introductionmentioning

confidence: 99%

Study on the Formation and Controllable Movement of Polymer Liquid Columns Based on Dynamic Control of Spatial Electric Field Distribution

Zhou,

Ren,

Tan

et al. 2023

Langmuir

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Liquid deformation and motion are very common natural phenomena and of great value in various practical applications. In this study, a dielectric fluid column formation and directional flow phenomenon are presented. Dielectric fluid can grow upward to form a liquid column through a spatial electric field and realize directional and controllable operation of the liquid column by regulating spatial electric field distribution. First, the adjustable electric field space is constructed by connecting the two parallel electrodes to the high-voltage DC power supply. Then, the regional electric field distribution was adjusted by the upper plate graphic and power supply regulation to drive the polymer liquid on the lower plate electrode to form a liquid column at different positions. The results show that the polymer liquid column can be driven by the spatial electric field distributed dynamic control method and that the height and the narrowest width of the liquid column are directly controlled by the voltage. With the experiment conditions that the distance between two parallel electrodes is 5−15 mm, the formation of liquid columns with a height of 5−15 mm can be controlled. In addition, the liquid column can be driven by adjusting the on-states of different conductive regions. When the voltage is 10 kV, the liquid column directional movement speed can reach 1 mm/s. The higher the voltage, the faster the directional movement. The research results can be used as producing polydimethylsiloxane stamp, localized heating and temperature control, fabricating a pulsating heat pipe, and so on.

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“…The fundamental premises that control their functionalities include efficient mixing on one side and arresting unwarranted deposition of particulate matter on the other * Author to whom any correspondence should be addressed. [1][2][3][4][5][6]. In evaporating droplets, the flow mainly occurs by capillary action [1,7], surface tension gradient [8][9][10], or buoyancy forces [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Induced flow inside a droplet by static electrical charge

Pradhan¹,

Banuprasad²,

Nandagopal³

et al. 2023

J. Micromech. Microeng.

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Introducing controlled fluid motion in a droplet turns out to be of outstanding scientific importance, hallmarked by a plethora of applications ranging from engineering to biology. While internal mechanisms such as interfacial tension or buoyancy-driven dynamics may trigger fascinating flow structures inside a droplet, controllability of the same without external forcing remains questionable. On the other hand, in an electrically forced environment, complex fabrication steps and special choices of the ionic liquid are often demanded. Circumventing these limits, here we bring out a new method of flow manipulation inside a sessile droplet by simply deploying a static charge produced by the triboelectric effect. This is physically actuated by charge transfer between the two lateral electrodes within which the droplet is entrained, triggering a strong ionized air current. The flow inside the droplet is generated due to the shear exerted at the interface by the charged-induced ionized airflow around the droplet, a paradigm that has hitherto remained unexplored. The strength of the fluid flow can be controlled by adjusting the supplied charge. Such unique controllability without sacrificing the physical simplicity opens up new possibilities for flow manipulation in a multitude of applications ranging from droplet microreactors to digital microfluidics.

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Programmable droplet actuating platform using liquid dielectrophoresis

Cited by 16 publications

References 33 publications

Electropatterning—Contemporary developments for selective particle arrangements employing electrokinetics

Electropatterning—Contemporary developments for selective particle arrangements employing electrokinetics

Study on the Formation and Controllable Movement of Polymer Liquid Columns Based on Dynamic Control of Spatial Electric Field Distribution

Induced flow inside a droplet by static electrical charge

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