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
Multitarget Sample Preparation Using MEDA Biochips
TL;DR: This article presents a generic multiple-reactant sample preparation algorithm that exploits the novel fluidic operations on MEDA biochips and proposes an enhanced algorithm that increases the operation-sharing opportunities when multiple target concentrations are needed, and therefore the usage of reactants can be further reduced.
Journal ArticleDOI
Behavior of microdroplets in diffuser/nozzle structures
TL;DR: In this article, the behavior of microdroplets flowing in microchannels with a series of diffuser/nozzle structures was investigated and the deformation of the microdroplet was captured using a level set method.
Proceedings ArticleDOI
Droplet dispensing and splitting by electrowetting on dielectric digital microfluidics
TL;DR: In this article, the authors investigated two essential capabilities of electrowetting on dielectric digital microfluidics -1) high precision and consistency in volume of a unit nanodrop dispensed from a reservoir, and 2) reduction of time to dispense and split drops.
Journal ArticleDOI
Integrating electrowetting into micromanipulation of liquid droplets
Bharat Bhushan,Xing Ling +1 more
TL;DR: In this paper, a conical gripper was used to pick up a droplet and release it onto a substrate by controlling the wetting property between the gripper and the substrate using electrowetting.
Patent
Method for Making Carbon Nanotubes with Embedded Nanoparticles
Yury Gogotsi,Davide Mattia +1 more
TL;DR: In this article, a template comprising an anodized aluminum oxide membrane with a pore diameter of 20-200 nm was used to produce carbon nanotubes with embedded nanoparticles.
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.