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
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Dissertation
Actionnement électriques de fluides dédiés aux microsystèmes
TL;DR: Un modele theorique complet est propose pour dec rire les effets du champ electrique sur le fluide et les objets en suspension et permet d'aboutir a de nombreuses donnees predictives cet actionnement electrique de fluide.
Proceedings ArticleDOI
A micro extensional filament rheometer enabled by EWOD
TL;DR: In this paper, the authors present a miniature system for generating and measuring liquid microfilaments for capillary breakup rheometry, where the key component is a chip that splits samples in open air, creating shear free liquid threads that can be measured by optical micrometry.
Journal ArticleDOI
A Microfluidic Acoustic Metamaterial using Electrowetting: Enabling Active Broadband Tunability
Shubhi Bansal,Sriram Subramanian +1 more
Journal ArticleDOI
Electro-hydrodynamics of droplet generation in a co-flowing microfluidic device under electric control
Lei Li,Chengbin Zhang +1 more
TL;DR: By coupling phase field method and electrostatic model, a numerical study was performed to investigate the electro-hydrodynamics of droplet generation in a co-flowing microfluidic device under electric control as mentioned in this paper.
Dissertation
A hybrid variational-level set approach to handle topological changes
TL;DR: A method for allowing explicit, Lagrangian meshes to undergo topological changes in an automatic way, using a level set method to guide the change of topology of the domain mesh and an optimization step using a variational formulation.
References
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Book
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.
Journal ArticleDOI
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.
Book
Micromachined Transducers Sourcebook
TL;DR: In this paper, the authors present an overview of Micromachining Techniques, Mechanical Transducers, Optical Transducers and Ionizing Radiation Transducers for Microfluidic Devices.
Journal ArticleDOI
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.