Journal ArticleDOI
Creating, transporting, cutting, and merging liquid droplets by electrowetting-based actuation for digital microfluidic circuits
TLDR
In this paper, the authors report the completion of four fundamental fluidic operations considered essential to build digital microfluidic circuits, which can be used for lab-on-a-chip or micro total analysis system (/spl mu/TAS): 1) creating, 2) transporting, 3) cutting, and 4) merging liquid droplets, all by electrowetting.Abstract:
Reports the completion of four fundamental fluidic operations considered essential to build digital microfluidic circuits, which can be used for lab-on-a-chip or micro total analysis system (/spl mu/TAS): 1) creating, 2) transporting, 3) cutting, and 4) merging liquid droplets, all by electrowetting, i.e., controlling the wetting property of the surface through electric potential. The surface used in this report is, more specifically, an electrode covered with dielectrics, hence, called electrowetting-on-dielectric (EWOD). All the fluidic movement is confined between two plates, which we call parallel-plate channel, rather than through closed channels or on open surfaces. While transporting and merging droplets are easily verified, we discover that there exists a design criterion for a given set of materials beyond which the droplet simply cannot be cut by EWOD mechanism. The condition for successful cutting is theoretically analyzed by examining the channel gap, the droplet size and the degree of contact angle change by electrowetting on dielectric (EWOD). A series of experiments is run and verifies the criterion.read more
Citations
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Journal ArticleDOI
On-chip micromanipulation and assembly of colloidal particles by electric fields
Orlin D. Velev,Ketan H. Bhatt +1 more
TL;DR: How dielectrophoresis and AC electrokinetics can be used in droplet-based microfluidic chips, biosensors, and devices for collection of particles from diluted suspensions is discussed.
Journal ArticleDOI
The Digital Revolution: A New Paradigm for Microfluidics
TL;DR: In this paper, the authors review the state-of-the-art in digital microfluidics, with a discussion of device formats, actuation physics, and biological and non-biological applications.
Journal ArticleDOI
Liquid metal enabled microfluidics
Khashayar Khoshmanesh,Shi-Yang Tang,Jiu Yang Zhu,Samira Schaefer,Arnan Mitchell,Kourosh Kalantar-zadeh,Michael D. Dickey +6 more
TL;DR: Liquid metal enabled microfluidic components are discussed, and their desirable attributes are highlighted including simple fabrication, facile integration, stretchability, reconfigurability, and low power consumption, with promising applications for highly integrated microfluidity systems.
Journal ArticleDOI
Principles of droplet electrohydrodynamics for lab-on-a-chip.
Jun Zeng,Tom Korsmeyer +1 more
TL;DR: This study shows that both electrowetting on dielectric and dielectrophoresis are effective for droplet generation and manipulation, and demonstrates: (1) the presence of a wetting contribution to dielectophoresis; and (2) contact angle reduction is merely an observable consequence of, not a condition for, the occurrence of electrowsetting onDielectric.
Journal ArticleDOI
Wettability Switching Techniques on Superhydrophobic Surfaces
TL;DR: In this paper, a review of the techniques leading to the modification of wettability behavior on superhydrophobic surfaces under specific conditions: optical, magnetic, mechanical, chemical, thermal are discussed.
References
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Fundamentals of microfabrication
TL;DR: The second edition of the Fundamentals of Microfabrication as discussed by the authors provides an in-depth coverage of the science of miniaturization, its methods, and materials, from the fundamentals of lithography through bonding and packaging to quantum structures and molecular engineering.
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Electrowetting-based actuation of liquid droplets for microfluidic applications
TL;DR: In this article, a microactuator for rapid manipulation of discrete microdroplets is presented, which is accomplished by direct electrical control of the surface tension through two sets of opposing planar electrodes fabricated on glass.
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TL;DR: In this paper, the authors present an overview of Micromachining Techniques, Mechanical Transducers, Optical Transducers and Ionizing Radiation Transducers for Microfluidic Devices.
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Electrowetting-based actuation of droplets for integrated microfluidics
TL;DR: In this paper, an alternative approach to microfluidics based upon the micromanipulation of discrete droplets of aqueous electrolyte by electrowetting is reported.