Fluorinated Superhydrophobic Surfaces for Digital Microfluidic Devices with Electrowetting on Dielectric and Magnetic Actuation
نویسندگان
چکیده
Digital microfluidics (DMF) is a popular alternative to traditional in-channel microfluidics, which allows precise control of individual droplets. Most commonly used droplet manipulation methods for DMF are electrowetting on dielectric (EWOD) and magnetic actuation. Both methods require high surface hydrophobicity to facilitate droplet movement, and often superhydrophobic surfaces are used to further enhance droplet actuation. This study systematically examines EWOD and magnetic actuation on natural, commercial and custom-synthesized superhydrophobic surfaces for droplet-based microfluidic platforms.
منابع مشابه
Droplet Shapes on Superhydrophobic Surfaces under Electrowetting Actuation
Droplet behavior on structured surfaces has recently generated a lot of interest due to its application to selfcleaning surfaces and in microfluidic devices. In this paper, the droplet shape and the droplet state on superhydrophobic surfaces are predicted using the Volume of Fluid (VOF) approach. Various structured surfaces are considered and the apparent contact angles are extracted from the p...
متن کاملDroplet microfluidics on a planar surface
This work reports on the modelling of, and experiments on, a method in which liquid is transported as droplets on a planar hydrophobic surface with no moving parts, merely through electrostatic forces generated by the underlying electrodes. Two-directional transportation along a straight electrode path and across a junction, fusion of two droplets and methods for importing, exporting and filter...
متن کاملDevelopment of a Digital Micropump with Controlled Flow Rate for Microfluidic Platforms
This paper presents a novel device for pumping a column of liquid in a microchannel integrated on a digital microfluidic (DMF) platform. The electrowetting on dielectric (EWOD) method is used to frequently actuate a droplet (referred to as the piston droplet) on an array of electrodes. A column of liquid (referred to as the pumped droplet) is pumped in a microfluidic channel by the pressure com...
متن کاملPreparation and electrowetting transitions on superhydrophobic/ hydrophilic bi-layer structures
A simple method of preparing porous superhydrophobic materials using glass fiber materials, where hydrophobicity is provided by a variety of coatings such as self-assembled alkyl-silane monolayers and fluoropolymers such as Teflon is presented. Fibrous structures of the filter material provide for the modulation of ‘‘surface roughness’’ on the microand nano-scale, required for achieving a super...
متن کاملHigh-throughput Patterning of Single Magnetic Beads Using Digital Microfluidic Technology
We present a novel strategy for patterning single magnetic beads by using digital microfluidics (DMF). A droplet containing a suspension of superparamagnetic particles is transported back and forth over an array of femtoliter-sized microwells by using electrowetting-on-dielectric actuation forces. Compared to existing methods, this technique allows patterning of superparamagnetic beads in micro...
متن کامل