Journal
MICROMACHINES
Volume 7, Issue 4, Pages -Publisher
MDPI
DOI: 10.3390/mi7040071
Keywords
electrowetting on dielectric (EWOD); digital microfluidics; droplet speed; switching time; velocity measurement; slender electrodes
Categories
Funding
- Defense Advanced Research Projects Agency/Microsystems Technology Office (DARPA/MTO) [W31P4Q-11-1-0012]
- National Science Foundation [ECCS-1254602]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1254602] Funding Source: National Science Foundation
Ask authors/readers for more resources
In many electrowetting on dielectric (EWOD) based microfluidics devices, droplet actuation speed is a crucial performance-controlling parameter. Our present study aims to characterize and study droplet speed in a typical EWOD device. First, a practical droplet speed measurement method has been methodically demonstrated and some related velocity terms have been introduced. Next, influence of electrode shape on droplet speed has been studied and a new design to enhance droplet speed has been proposed and experimentally demonstrated. Instead of using square shaped electrodes, rectangular electrodes with smaller widths are used to actuate droplets. Additionally, different schemes of activating electrodes are studied and compared for the same applied voltage. The experiments show that a particular scheme of activating the array of rectangular electrodes enhances the droplet speed up to 100% in comparison to the droplet speed in a conventional device with square shaped electrodes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available